Some do. At first i was embarrassed because they made fun of me but then one of em played it and he was like "DUDE THAT GAME IS SOOOOOO COOL! And now my whole group of friends play.
Well none of my irl friends except for one know I play RS, and the rest are into other games like guild wars and stuff like, I would play games like that but it is because I just cbf downloading all the clients for the other games, But the only reason I play RS is because it is a game I actually enjoy playing and there are a fair few friendly people on there.