Sorry, my fault: I misunderstood the part with the delete. You meant the
rights, and not the 'delete' itself.
But again to the rights hint: We double-checked the rights of the crucial
sites, with different test-users and guests (without sessions). We testes in
different browsers and even in VMs on different OS. I wrote even a small
crawler to penetrate our site more regularly and controlled. We reproduced
some guest-edits with our crawler. But we can't edit these sites when we are
moving on our site as a guest manually. So we can't reproduce it directly
and repeatable.
We only know, edits and deletions are possible for (crawler-)guests
sometimes under some unknown circumstances and causes, even if its not
possible for 'us', when we are guests.
I will test your extension 'Admin Tools Application' with CheckRights you
posted on the reply later. Thanks! This will be very useful for our daily
routine anyway.
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