Others would do all sorts of stuff to get a win, the classics being chugging estus, cheap shots, spamming, and all taunt afterwards like they deserve it.
While good and onourable PvPers would deliver a good game, and always bow before and after, and nothing cheap ever happens. I even had a host switch to bow and arrows when I was shooting him with mine, and had a really fun bow fight. I always send a 'good game' to these hosts, and some reply and we chat a bit. Good lads.
I figured some 12 year olds just find winning the most important thing, while they don't see anything in a good, fair fight.