I wouldn’t say it’s particularly clever. It’s a fairly obvious idea to anyone who has worked with alerting through IMs. What it is, is /difficult/, because you

I wouldn’t say it’s particularly clever. It’s a fairly obvious idea to anyone who has worked with alerting through IMs. What it is, is /difficult/, because you really really need to avoid false positives. Probably lots of hard work involved. So kudos for making this work (if it works)!