It depends on the curve of the boot, some boot strikes allow the booter to retain all of their previous posts in their profile and some are wiped clean as a powdered bottom in a fresh diaper. Remember the Haaaaaa dude? He still has his member marks, and I would assume his profile along with the member marks he has given are still intact.
Almost all of my multiple alias start ups are still intact as well, except poopstinger, jiveturkey, and sirloafalot were all taken out with extreme prejudice.
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