Here are yahoo rules:
To this end, each Public League fantasy team owner (Custom Leagues are controlled solely by the League Commissioner) agrees that, by joining the game, they will abide by the following regulations:
All league-related transactions will be executed with the intent of improving the owner's team or its standing within the league.
No owner may drop or "dump" players from their team for any reason other than improving their own team or its standing within the league.
No owner will engage in any action that might be deemed to be collusive (two or more owners agreeing to make moves that benefit one team, but not the other).
No owner will make any roster moves (including waiver claims, trade proposals, etc.) whose sole purpose is to hamper the play of other owners.
No owner will take any action whose purpose is to, in any way, interfere with fair play in a league.
I'd do it.