There needs to be some kind of safety on the "block host" button, perhaps a pop up window like a "are you sure you want to block host?" kind of thing and/or some way to undo the block host fuction. I have accidentally hit this button twice now while in the middle of chatting with someone, and I admit its my own stupidity, but there should be some safegaurd in place to save idiots like me from themselves (and other users in the middle of uploading from me! )