Personally I have no problem with governmental regulation at the exchanger level, because its super easy to launder the Bitcoins after or before exchanging in or out. USD can already be easily tracked, so it makes sense to make the exchange process as clean as possible.
Can you provide a hypothetical example explaning how bitcoins can be laundered? To get started, let's assume I have been milking my neighbour's cows and selling the raw milk for bitcoins, falsely advertising it as mother's milk. There are several more-or-less illegal aspects of my business. I need to launder those coins. Please enlighten me. Let your creativity run wild. The end goal is to have the coins laundered, meaning I can convincingly demonstrate that my coins in fact originate from some sort of legal business.