I delete their account and leave all the content, I've never has someone complain that their posts were still there, if there are posts that contain identifying info I will selectively edit/remove those posts.
I currently use AWC for for donations on my vB 4.2.x forum but their product is getting a little stale and their support has dropped off the face of the earth so it is time to migrate to something better. Is it possible to install vBDonate Lite to do some config and testing with while I'm still...