Probably a stupid question (sorry!)

[cripman33]

Where can I find the guestbook?

[Deleted]

There are no stupid questions, only stupid answers.

For the complete site there is apparently a guestbook.
However, when I was not yet a member of this site, I did not reach anything as a guest via the relevant link. Which was no longer necessary after the registration anyway.

The individual members have no guestbook, as far as I can tell.

Unfortunately I cannot tell you more.
The best you can do is to ask someone from the staff, I think.