Yeaaaah, we thought of that too ^_^ Like, veteran RPers are rarer, and suchlike cos they've left or whatever.

And then we could have effects according to their character. Like;

RP'er Name: Weasel Overlord
Element: Earth
Mana Cost: EEEEN
AP/DP: 5/3
Effect: EEN "Yaoi-fy!" - Any two male characters on the field become too preoccupied with making out to do anything else.
Choose one of your characters and one of your opponent's characters. Neither can attack or activate any abilities this turn.