There is nothing preventing bad content atm, and I may look into this, but with it being largely client side (peer to peer) I have a feeling that will be tricky and obviously anyone knowing what they are doing could get around the safeguards.

There is no chat functionality but yea that is very high on my list of todos.

Not sure, I have never come across anything like that but I feel like its something people would like, especially considering most people have been locked in doors more often than usual lately.