Daniel Peterson wrote:But I still don't believe that drawing someone's attention to a public internet posting violates any rule of either ethics or internet decorum.
I agree with 99% of that sentiment. The internet is a public place, and anything posted is fair-game to be read by anyone. If sending someone a link they might be interested in is bad form, then we're all guilty of indiscretion.
My only point of disagreement would be the 2 layers of anonymity that were circumvented. If the author of the email in GoodK's post were identified, or GoodK himself were easily identified, then the information would have been more "public". But one of the ways to keep things "private" even in "public" is through anonymity.
But using someone else's photo as an avatar is pretty tacky, aside from any concerns about protocol. Usually an avatar is supposed to represent you in some way, so I'm not sure what is being said by using a picture of someone with whom you are openly antagonistic.