What bike? Oh that bike in the corner? That's not my bike. I confiscated it from a student who had it in her room. I'm waiting for the cops to come and fingerprint the bike, question it thoroughly and take it away....

RA's are supposed to set an example. Yes. But they are also supposed to use good judgment and use civil disobedience when called for. Keep the bike in your room. It's a ridiculous rule if they don't supply a VIABLE alternative that will protect your bike.

I would state to the "authorities" that you wish to be an RA but you must also protect your bike. Perhaps this would force them to find a storage room inside the dorm that could be used for highly loved and/or valuable bikes.