Telling a player they should quit? Is that ever justified?

[Penthea]

I honestly think they could be constructive if they didn't devolve so quickly. I've had very sound debates with people that aren't for parsers, or who dislike raiding. But you can't expect that level of maturity from everyone, I guess.

This is why I tend to say my piece once or twice and spend the rest of my time in those threads silently lurking, if I even post at all. They always devolve into the same s*** because you get individuals who are more interested in pointing fingers than resolving anything.