Not in the app. You need to contact your local police and have them contact Sonos.  

Or how about getting your roommate to knock some sense into his friend?

Ya I tried and so my speakers grew legs and walked out. Yes I believe it's the police thing then.. thank you

The key thing that I want to echo in @jgatie ‘s post is the fact that the police will have to contact Sonos directly. Sonos will not intervene without that direct interaction.