I think people doing any movement with too much weight compromising form puts them at risk. Ego lifting is the danger. There are lifts that are acceptable to perform "cheat" movement to shock the worked muscle. Even then there is a correct way to doing it.

For the most part intensity is mistaken for too much weight. When it is actually the correct amount of weight, utilized in a manner to engorge the worked muscle with so much blood it feels like it is going to explode. And blow chunks of devastaded muscle tissue all over the concrete!

Skull crushers can kill your elbows !!

Any lift done improperly is "dangerous". You can't tell me that someone doing heavy dead-lift's improperly is less dangerous than flys??? It's all about learning how to do each lift properly and then listening to your body and keeping your ego in check. We all have lifts that we avoid due to injury or the like. Just be smart.

There are always two sides of a medal.

I simply have to disagree. You cannot generalize which exercise will do more harm then good. Every exercise will have it's risks and benefits, some more, some less. Further some exercises will be golden for some because they're able to hit the muscles way more with the exercise then with others. When people have the morphologie for a movement and are able to hit the muscles better then with any other exercise, isn't the tradeoff worth it?

You can always bring an argument against your statements. "What if you have the shoulder mobility to do behind the head overhead presses?" Hell, look at dmitry klokov, he does the behind the head press in a deep squat position with super heavy weight. Wyh?! For shoulder health and strength.. Still risky, yes, but we're in a sport where every movement can injure you. We simply need to be aware of that fact.
Another example, Alberto nunez just recently added leg presses back into his training and reports how well this movement improved his training, size and lower body strength.
Same goes for a roundback deadlifter. There's definitely a higher chance he will get injured compared to a flatback deadlifter, but that doesn't necessarily mean that the flat back deadlifter will stay injury free and the opposite holds true as well.

I think every exercise has it's purpose, it's up to the individual to decide which exercise to do in a routine and more importantly, why they're actually doing it. I see so many people having lots of stuff in their routine, without even knowing why they are doing it.

Ooookay, going to stop now. Don't want to bash your thread but I simply disagree and say that you can't generalize something like this

U can get hurt doing any exercise really. I through my back out doing standing calve raises once. And it wasn't even heavy. It just happened. U have to know ur body and limitations. Warming up properly and stretching, doing things like band pull a parts etc... will help prevent injury. The list goes on and on.

I used to love deads...two back surgeries later, I'm not allowed. Didnt hurt my back doing deads though, last time I fell on the ice taking out the trash. :/

I guess I would have to flip this around and say three exercises that can benefit you more than hurt you. These are all pretty much staple exercises for overall targeted muscle development. All exercises have the potential to hurt you if done improperly. Done properly these exercises provide a multitude of benefits for developing your physique with minimal potential for injury.

I think deads are pretty bad for your back if your form isn't right.

For myself, I made the experience, that you can do any exercise (unless you are already injured) if you do it correctly and controlled. If your goal is to build up your body, there is no need for heavy weights. So just pick the right weight if you are doing stuff like the behind-the-neck-press, focus on the muscle-mind-comnection and dont go always to failure while doing exercises like these.

If you ever feel something is wrong and hurting stop. Then lower the weight and use correct form. Any time you challenge yourself there will always be a possibility of injury. Make sure you warm up and get the blood flowing in your joints. Use strict form and dont try to impress anyone. Do what your body demands and push it.
Each of us are different. When people tell me they can't do this or can't do that it always ends up being squats,deadlifts etc. The hard gut grueling exercises. However everyone wants to curl and bench. Most of the time the pain in the back or knees always comes back to bad form or not getting blood into the areas you are about to destroy.
I use all 3 exercises you listed. Leg presses ok give or take as long as you squat enough. Behind the neck is crucial imo for building shoulders. Some consider it old school I just laugh at that. Flys I mix up I always prefer free weights for mass.

There's absolutely no substitute for flyes and your chest will be incomplete without them. Period. The other two exercises I could take or leave but the behind the neck press does give a great pump. Leg presses built my quads up until the weight was too much and I got patellar tendinitis. Moved to basically squats, front squats and hack squats as my only quad moves and legs got bigger and stronger.

https://www.t-nation.com/training/inside-the-muscles-best-shoulders-and-...
That wil tell you why we do behind the neck military presses.

You are likely to catch a lot of flack over your whole post. Most all heavy lifts we do have potential to be dangerous. Know your limitations,,, And then push right fucking through them!!