Well, this is interesting. We have sucuri monitoring all sites now. It ran into Admin Tools today. Admin Tools interpreted "bad behavior", blocked sucuri.net and asked me if I wanted to add the IP to the blacklist.
Actually, I would like to add them to a whitelist, but I do not see a whitelist (except for Admin access).
My custom message for bad behavior block was delivered in a 403 page to Sucuri, who then forwarded it to me as blocked by them (the 403 page is blocked).
Hmmmm... what to do, except to turn off the block for bad behavior? Temporarily?