DRM has the perfect solution. If you want to eliminate the pain in the butt of answering PMs, post your phone number and/or real email address. An idiot who knows your contact information and still asks silly questions on the thread deserves to be ignored and that's what I would do. If the question serves all readers, OK, post it. However, the seller may not bother to answer if he has posted contact information. Leave it the way it is and toughen up to replies by idiots. As far as TTT, an occasional reminder that an item is still available is harmless, in my opinion. However, maybe meaningless blabber on the for sale section could be minimized as a matter of courtesy.