People don't pass amendments...Congress does. And, you are not going to get enough people to demand that Congress pass an amendment banning firearms...period. You can have all the pipe dreams you want but, it isn't going to happen.
I will agree with you entirely on this point, that increasing numbers of people crowded into one place is causing a problem. And, folks are going to have to start learning how to deal with it and start learning how to get along because it likely isn't going to get any better for quite some time.
I am aware of the process for an amendment. I was being general rather than specific. In theory, if the people want the amendment then their representatives will initiate it and the various states will ratify it. Personally, I don't want a change to the amendment and I don't see much chance for it. I don't believe people should be restricted from owning any weapon if they use it lawfully, so long as the weapon itself is not inherently dangerous. Such as a 500 pound bomb sitting in my neighbor's garage. However, just because I feel that way does not mean I am just going to pretend the 2nd amendment does not say what it says or that the SC has not interpreted it the way they have. The fact is the SC does not see it as an unlimited right and the states and feds do have the ability to regulate. Like it or not, that is the reality.