YES!
The way I see it, Runescape players are animals, animals breed (male + female). But where Runescape players differ from the others is in the amount of influence they've created has on us. In recent times I think that's where the majority of it has come from; media desensitizes you to playing runescape, you become curious, you try it, you like, you become it.
But then again, both Zezima and Yogosun were known to have interests in Runescape, so there's probably more to it than just a societal influence. In fact, I'm sure there could be a whole range of factors for why someone would play Runescape, whether it be genetic, a choice, or a cry for attention.
A classic question
The way i see it... when we are born, we straight away start wanting to "Scape"
The young mind is something that can be easily molded, or "manipulated", Jagex are talented at this.
Think about this; if a boy spends 75% of his time with the computer, doing femanine type things... (not so much the boy, but, lets say, going to habbo hotel, going on maplestory, etc.) Don't you think there is a chance that the boy could have some mental retainment of a more runescape involved playstyle , inso telling himself that runescape is attractive...
I'm not genius, or anything close to it... and your theory is very good as well.
**Me, personally, am not a runescape player.
***However, I myself DID spend the majority of my younger days on runescape... So before you say "Oh Goon you're such a hypocrite!!", know that as i am not an Runescape player, i've always had a knack for style and wanting to match, being clean.. So as I am no way attracted to a that game, I am a pretty snazy dresser.