When discussing the irritating behaviour of small children in pubs, the point is often made that adults, whether drunk or sober, can be far worse. While, in extremis, this is undoubtedly true, I have to say it is something that I seldom personally encounter.
While I freely admit that I am rarely to be found in pubs at the rougher end of the spectrum late at night, it is vanishingly rare that I see “bad” behaviour from adults. Maybe some overloud cheering from sports fans, or an old boy who’s had one too many attempting to croon a song, but never anything like running madly around the pub, jumping on and off seats or fighting. Adults, even if a bit inebriated, generally know how to control themselves. And any adult who decided to shout at the top of his voice for a prolonged period would be swiftly ejected.
Plus it must be years since I have personally been the target of insulting or threatening behaviour in pubs. Maybe this is more likely when you are of a broadly similar age to the perpetrators, and once you become identifiably just another middle-aged bloke you tend to blend into the background.