Being Flexible > camping shit because you THINK your class ain't got a role in your party up in mid.
I saw Melee being decent up Mid, certainly you don't want 6 melees in a 72 slaughter, but you also don't want 6 healers or 6 tanks, do you? It's a TEAM WORK game, Camping is FAR from teamwork.

Beside that, you can't actually keep a smart healer (since it's the only target worth keeping "busy" as you said from mid) away from the battle field, you would hold me for a second for example, and I am certainly not the smartest healer I know. Keeping a healer away from mid? haha you must have really bad healers over there.

You must be one of those players who don't change to healer/ranged/whatever even when your GC need it.