I just received three of these today. I was AFK for the first one and about 5 minutes after the invite timed out a second request came in. I declined, added the id to my blacklist and reported it the old fashioned way. About an hour later I got a new invite from the same RMT spammer who did nothing more than create a new id with a different last name. The best thing to me would be for SE to add profile options that allow me to choose whether I want to reject invites of the various types. Being forced to use \busy is kind of like using as sledge hammer to drive a nail to hang a picture on the wall. It's overkill that stops other communication functions I want to work such as tells or ready checks.