Well, why do they?
Sometimes catfights flare up between the girls on the boards, and they escalate into total war. Also, some girls have grudges against each other and carry their personal animosities onto the boards. Then we get a lot of patronising comments where they call each other "darling" and stuff while they're cutting each other's cyberthroats.
I really don't know why this happens. There's got to be enough business out there for everyone. Some of the most successful escorts in Ireland don't even comment on the boards, so it's not like being Queen of the Boards makes you Queen of the Escorts. I get turned off by escorts who engage in this sort of thing for extended periods, and I can't imagine that it gives them a good profile towards any rookie punter that might be interested in engaging them for an hour or two. So please stop!