Hello Akeeba, Nicholas,
Thank you for your extended answer.
I still did some testing why I thought the messages where swapped.
In the Rescue mode documentation:
https://www.akeebabackup.com/documentation/admin-tools/rescue-mode.html
"First on all, when a blocked request is raised the visitors see a message informing them they did something they shouldn't have done. You can customize this in the Configure WAF page, Customisation tab, Custom Message option. If that option is left blank the default message generated by Admin Tools contains information about unblocking yourself."
I changed the Custom Message option, but I still got the "unblocking yourself information"!
Now I see the second part of displaying messages becomes active:
"The second place where this is displayed is the message shown to blocked IPs. You can customize that in the Configure WAF page, Auto-ban Repeat Offenders tab, Show This Message To Blocked IPs option. If you leave this blank or if you use the default message ("You are a spammer, hacker or an otherwise bad person.") the information about unblocking yourself will be appended to the end of the message."
The "unblocking yourself information" is still being displayed if you use the default "blocked IPs message".
Changing the Custom Message has no effect on this part.
And maybe the default messages give me some confusion:
The "This request is blocked by Admin Tools." is NOT for the Auto-ban blocked IP's.
The "You are a spammer, hacker or an otherwise bad person" is NOT for the "suspicious" users of a "security violation" (help text Custom Message).
After re-reading I see it is the "intended behavior of Admin Tools" but it cost some time to see the exact difference and behavior of the two messages.
Regards,
Richard de Boer / Richard Schlichting