I think this would be nice to show the number of threads they've contributed to. I know I'd like to see this myself.

The problem (from being on other boards who DO that) is that when people see a thread with the CA shield, they will often (not always) flock to it and start spamming it with anything and everything. This most often turns the thread into a mishmash of on- and off-topic posts, made in haste without thinking about wording or content, in the hope that a CA employee reads them.

Then again, with the user "filtering" that the org uses this may not be that big of a problem here...?