I've noticed that a manager only on the trading floor ridiculing ex-employees. Comments like "John was a f* idiot how did he get hired" or "I hated working with John he was always...". At what point is this too much? I'm trying to figure out where the line is.
Caveat, John wasn't well cut out for a trading floor and did some really dumb things. Also, I've definitely joked about when a co-worker did something stupid, so I'm no saint, but in private and not that often.