A knife is convenient and accessible as well true, but it is easy to understand that swinging a knife will hurt yourself and/or others.

While social media doesn't have that, we don't automatically identify social media as dangerous unlike swinging a knife or pointing a gun.

I do understand your point that the user is still responsible in some way, I just think that knowledge of its danger be more widespread.

If you ever read any of the thousands of terms and conditions you agree to when you pick up your phone, you would see that choosing how you use it, is most certainly not up to you.