BuddyPress.org

While this issue is being worked out

Do you mean while I get this situation worked out? Or do you mean that people are working on this because numerous people have been getting this issue?

you should either block the offending site(s) from attempting to accessing the non-existent files, or you should do a 301 redirect of the moved files–or at least the moved directories.

How do I block the offenders (especially when one of them is googlebot)? How do I do a 301 redirect of the moved files (this might be the best, except for when they dont exist anymore like old plugins that i no longer use and deleted) ?

Thank you for your prompt reply, too.