A couple weeks ago I was Shanghaied into playing a game of Battlestar Galactica. Amongst a bloated Baatan death march of a game were two things I liked: one is the unmask-the-traitor mechanic (which I prefer in The Resistance and Saboteur). The other was the skill check, where the group must play cards to a communal pile hoping that the total among good suits minus the total from penalty suits is enough to "pass". Different results mean different things. I also dug this (albeit a little more vanilla) in Musketeer.
Is it kosher to nick a mechanic like this, or does it need to be dressed up/done differently?