How about this 'one liner' on top of the forum - "Requests for serial numbers or other warez can result in loss of account. You have been warned!" Parked right on top of the forum it's right out in the open where everyone can see it so the lamearse excuse "I didn't know" will be even lamer the it already is (if that's possible)

Why shouldn't speech be free? Very little of it is worth anything.