Getting marked is why I stopped playing DRK in PVP (despite how busted it truly is), because I can not and will not play leader for people. It's the same reason I don't tank in general, because I don't know the first thing about shot-calling and such, and don't want to be the one taking all the blame when we inevitably lose/wipe.

In a similar vein though, marking has also helped me to avoid pointless matches. People keep marking someone named Olivia on the enemy team and that's my cue to take the leaver penalty because the fight is already over in the first couple of minutes, lol.