So I inherited commish duties for my dyno money league because I won it last year, and one of the new rules which got voted in by a 9-1 margin was that teams had to field a 'complete' roster each week. The reason for this rule being necessary was because there were a couple of owners who would refuse to replace defenses/kickers/TEs when their guys had byes or injuries or for whatever reason were not active that week. Their reasons for not doing this revolved around the fact that it's dyno and they didn't want to drop a 'valuable' player for a one week rental, and/or they didn't want to spend the $3 transaction fee for a pick up.
So, a rule (passed 9-1) which states that a $10 fee will be assessed to an owner per lineup spot which does not have an 'active' (don't worry about that word, just assume it means no byes and no IR) player in it.
Cut to week 2. An owner who had learned Fournette was out, took him out of his lineup but didn't replace him immediately with a backup (he had no good options, but that may be beside the point, he had options). By Sunday, he still hadn't put a bench player into that spot. By Monday it was too late anyway. After speaking to him he claimed that he did place a player in that spot, but the site (CBSSports) must not have worked when he hit the 'Accept Lineup' button.
So, I've now got a couple of guys talking about assessing the fine to him, and I would like to not bother because he clearly wasn't throwing the game with this action, and he wasn't intentionally violating the rule for his gain (losing for better draft position, it's week 2 damn it, he won his week 1 game) or for his opponents gain (no one has accused them of collusion, and looking at his roster and available WW RBs there simply wasn't a replacement with a likelihood of scoring anything more than 5 points less a random TD).
So, we made a rule which reads pretty clearly that this is a finable offense, however, the spirit of the rule was not violated in my estimation from talking to both coaches involved in the game.
I look at this as an honest mistake, and fining people for honest mistakes sucks the fun out of FF. On the other hand, the hard core guys have a point about the letter of the law.