Last year I was in halls, had my jump bike and trials rig with me. Here they have a brand new glass dome style thang going on with a magnetic key to get in. Thats where my jump bike went, and about 3 other trials bikes from other users of the forum. They also had a brick shed with a substantial door with a normal key to get in. This is where I kept my trials bike (preferentially, thought it'd be a good idea if no one could see my bike) Both bikes were locked to the racks using Kryptonite locks. Never had any problems. I did bring it into my room now and again for maintainance, and as long as no one saw me take it in there, there were no problems as my room wasn't checked and it was big enough to sling behind the door and forget about.