Remember to turn off your WebEx when the demo ends. Especially if you have strange fetishes.
For real? I’ve never seen anyone’s fetishes on WebEx. But whenever I’m getting a screensharing demo and the presenter forgets to disconnect at the end of the call, I can’t keep myself from watching for minute or two, before I disconnect. You never know.
See also: Tip #48: TMI.
Rafe
Pro PR Tips 
Even better, skip WebEx in the first place.
Dude, c’mon. Give us examples.
I think the same can be said for conference bridges. All to often clients want to stay on the line to discuss how the interview went. Absolutely not – you never know who hasn’t hung up yet!!
Another potential danger is not clearing your cache on your web browser. I heard one tale of some poor dude that was giving a preso to his entire co and was keying in a phrase that led to a very embarrassing phrase auto-populating into “type-ahead”…
It was a virus!