Neighbour is just pining for a fight – any way to avoid it?

She's a rebel and a punk, no job or occupation, another boyfriend has left her (many of these) and she is itching for any excuse. It's the middle of Summer and they just built a noisy gym downstairs – these things don't help. We have a communal passage and she is littering and attacking things more than usual. I don't give a shit because I'll do any gardening or sweeping but you can tell she is just blatantly itching for a showdown about some bullshit. On one hand it all seems adolescent, on the other the previous tenant in my flat was a convicted bank vehicle robber so it may be par the course. Next year I'll graduate but until then I am stuck here with little Ms. Behaviour. Tips to deal?