<p>As I mentioned to you in a previous post, colleges have policies. I have read them at my own kid’s school, also a large university. I just looked them up for Berkeley and it is similar. There is a Residential Code of Conduct at Berkeley. Violations go through a judicial process. These students broke the rules/policies. I would think if this student is vigilant about it, he can report this problem to housing staff as well as other college counselors on staff. Once alerted, they can go out of their way to catch the individuals if it is a frequent activity in that dorm room. The RA can check in frequently, etc. to catch the violations. The consequences for these sorts of violations often include loss of housing privileges and other things. There are policies and staff on board to help students deal with these matters. I would suggest this student explore every avenue and to familiarize himself with the policies and procedures and his rights and use those in discussions with the proper personnel.</p>