Already posted in the other thread by the same name, but I would agree that blocking a pop-up blocker is not a nice thing to do to people. Underhanded is one word for it I guess, but upsetting people coming to your site is the real problem, and it’s these sorts of tactics that give our industry a bad name.
Actually, I guess I’ll share a short story. When I first started in this business, I was talking with a business associate about the concept and letting him know that we are going in to the online casino marketing business. His first response was… “So, you are going to be doing all of that pop-up stuff?” I of couse had to explain more.