Quote from Rezzahan »Then simply say "stop" and demand the time to think before anything else happens. Once again, Magic is not about reflexes. You have the right to ponder your response, so long as you do it in a reasonable amount of time. What they are doing is not acceptable, and in any kind of tournament environment, you should call the judge on them. They do not get to make decisions for you and you are not on a clock to make them.
We only have one judge, who is a co-owner and one of the problem players.
It may be something to report to wizards, but it's not exactly a completely legal store. It frequently runs out of stock and will rely upon some players acquiring booster packs from local sellers and getting store credit or discounts.