When someone reports you they'll end your auctions.
So it might be a week, it might be a year, but somewhere down the link some competitor selling a similar item will turn your hiney in. They give you your listing fees back, but you lose a weeks worth of time in your auctioning process.
We have one user who puts just a text link and a one or two line description of us in their signature to their email and it works very well for them.