How big a problem are they though? Are they a big enough problem that we need to introduce entire systems to eliminate them or make them follow strategy?
Or are they, as in my own experience, extremely rare to encounter ?
I get a noticeably "bad" player in maybe 1 out of 200 runs. Someone who plays at 5% would be immediately noticeable in a dungeon so considering that until just recently I was running near all my roulettes a day you'd think I'd meet more. Personally I think there's a bigger problem with people who care way too much about what everyone else in the party is contributing than people who contribute too little.