flowers, NO WAY! (“This place has potential to be completely anonymous, and can make him/her just enough embarrassed to make him change”).
A Nechtiger Tug. We never know how anonymous anything is, because mods have access to ALL email addresses and who knows what else…
You might have the best intentions, but I strongly doubt any Rov would allow embrassing of any kind, anywhere! Thats the childish route.