There's a general policy of "no goodbye posts".

It makes sense, in that it probably cuts down on CDEs to some extent- not that when people want to leave because they are hurt or scared it's not legitimate- but if people are constantly posting "I'm leaving stuff" it doesn't seem like it would be great for the community as a whole. You could try a few things though Skeezyks

You could see if you can post on her wall on her profile, you can try to private message her, or sometimes people will have it set up so you can email them through the board.

You can also send her a friend request.
I feel like all of these might be a show of support and a lot of times people have email notification set up so she may be able to see that she is getting any one of these.

I understand the frustration, but I think it's hard to get so many people with so many pbakcgrounds, personal experiences, points of view, and individual issues to contend with without there being some mixup and hurt feelings- it probably is most important what we actually do when that happens.

I bet the poster would appreciate knowing you are trying to offer support.