My eye was caught by a number of SPAM comments being posted on a number of “Featured Commercial Models” entries.
The offending account (which unsurprisingly has no content of it’s own) is:
https://3dwarehouse.sketchup.com/user/4e728903-2327-443b-8a30-86b87786482f/Bethany-W
A short list of model pages that were commented on is:
And it goes on, and on, and so on…