Redneck Parrotheads:When I stopped showing mine, the SPAM from Groundspeak accounts stopped. I can't tell if I've gotten SPAM based on my email having been visible for a long time and gmail does a great job of protecting me from the SPAM monsters. Speaking of monsters, the worst I've ever been SPAMmed has been from signing up on Monster.com.
I find Gmail does a great job of sorting things out for me as well.
Worst spam sites, imo:
1) Monster
2) CareerBuilder
3) craigslist (until you delete the post)
Personally, I've only had one spam message (that I'm aware of) from Groundspeak, so I'm not concerned about spam coming from any groundspeak site.