I don't know if that has anything to do with security in a garage system, but attack on my forum, which has caused lot of problem, started from porn spambots adding lot's of vehicles with links.
I lost 40k users in few minutes. These were replaced with 170 bots. ibf_members tabel was restored without any problem, but i didn't have backup of 'uploads' folder. Whole IPGallery and avatars were pruned.
Just want you to know, but I'm not blaming anyone. I dont really know if it was security problem with ipb or garage system.