My Italian housemate currently has two girls and one guy staying in his room from what I've heard through the door is until "we find a job then we can afford a house". Now I'm a fairly laid back kind of guy but what should I do? Tell the letting agency? Go and sexually harass them til they are forced out? Go and brick him in the face? Bear in mind this is now 5 unemployed dickheads currently inhabiting the house so its fairly busy.

Help me.