Over the years ive often observed from a distance people who will eat in a posh restaurant dressed up to the nines,talking down to staff,engaging in " look how well im doing " conversations so anyone in earshot can be so impressed,picking holes in everything........................then leave and get into their crappy Ford Mondeo leaving everyone in the restaurant whispering about what a shower of c**ts they were.Its a way for them to " rise above " their usual level even if just for a short time before returning to the norm.
Alternatively,a bunch of roughly spoken,slightly loud and aggress