Never heard anyone before say they tried to avoid them. Most of the time when someone had one of the calling cards, they'd try to get it. It was pretty common even for lots to ask in chat to be targeted.
I always thought it would be interesting if they did something like that , but make it have some kind of effect on your gameplay for a handful of matches ...... limited health or slower movement ....... or with these maybe have to stop and scratch every
now and then.