I'd like StackExchange to please block the ability to ping oneself manually in chat. I've been playing with that a little lately and it crashed my browser! (Safari 5, OS X 10.6.7)
I'm pretty sure that that's what crashed Safari because I tried to edit a "self-ping" and Safari crashed. I looked at the log and it had something to do with a localStorage bug. (It could be chat doesn't use this and I'm off my rocker with this one.)
I know that chat wasn't designed for this, but I think some stricter checking would help prevent crazy folk (like yours truly) from self-pinging our browsers into submission.
After several attempts of failed repro, I'd like to point out that it's still odd behavior. Unless you want to make it standard behavior (for the purpose of continuing one's sentence), this behavior should be blocked/fixed.