While that is true in the short run. People who regularly consume alcohol to excess can, indeed, see changes in personality. Particularly, it can make them more reactive. They basically get a shorter fuse. And it also decreases their ability to properly assess threats. They can perceive slights where none was intended. Extensive alcohol abuse can also increase paranoia. So inebriation could be a factor in some of these events.
But, I don’t think this really addresses the op. It’s probably more likely that this seeming increase in bad public behavior is due more to recording being ubiquitous. As is being discussed in this thread