Spam filter and change nametag color

Is there a way to prevent people from pasting spam constantly and ruining the chat? It’s gotten so bad for me that all the new messages freeze my browser and i cant even ban the spammer. Also, the moderator should be able change the username color in chat so that you can read names when the background is black.

Hi there… does this happen in a room that you posted publically somewhere? It would really help me if you could send a link to that room to so that i can investigate that case and block spamers.