Shoutbox

It wouldn't be possible to have them click your PSM as this doesn't send any sort of command back to your messenger, however it'd be possible to have it so they send you a !yes or !no command which the script would the detect. There may even be a similar script already [you could try looking in the script database if you haven't done so already] but I don't have time to search now, someone else might be able to help more.