I think perhaps they have a beef about the "literacy" thing people do. Younger members depending on their experience sometimes are shunned out of an rp simply for their lack of experience. Now, honestly, that's like forcing people to like each other.. Its a matter of what you want for your group or personal rp.
I find that some younger members are very good at role play. Very, very good. But at the same time one gravitates toward their age group more or less.. I suppose they think that its 'wrong' to not rp with someone or not allow them in a group due to their experience. Which is like forcing people that are experienced at basketball to invite those that don't play much at all to a team. In the end both parties suffer: The team loses its effectiveness and the new players feel inferior or they feel left out. Perhaps an unpopular opinion, but this is what i see.