It sounds like you might have someone that is reporting your auctions, judging by this thread, and the other post you had regarding your store.
Generally, eBay doesn't specifically go searching around looking for violations. They get information from users who report auctions for suspected violations. THEN, eBay investigates, and decides to pull the auction or not.
Is there a lot of competition in your category? It's entirely possible that another seller is trying to make your life hell by reporting your auctions, or possibly a buyer that had a bad experience, or some self-righteous busy-bodies that just don't like people selling harmless toy guns... you get the idea.