> Can HP pull auctions for ink cartridges that are claiming to work with one of
> their printers?

If they infringe on their trademark then yes. Putting HP all over the auction and using their logo. However they probably won't bother. It's a bad analogy though, alot of people that use MAME as part of the auction description are involved in illegal activity. That illegal activity is then associated with MAME. Would you be upset if you got blamed for other peoples crimes?

If you're that bothered then create your own emulator & register the trademark.

smf