Similar to the Max Level Difference filter, I suggest adding 2 more similar filters. 1. Max and Min Skill Rating requirement - The Min requirement filters rating to <900 and Max requirement filters rating to >1800. Reason: this is to filter out the bad players (sorry this might sound harsh but if your rating is below 800 you should just get a refund and for those above 1800, I'm sick of your trolling.) 2. Blacklist - Not sure how this will be implemented, but probably can be done by recording the user's SteamID. The blacklist should only work for the lobby host. Reason: To prevent annoying players from joining.