OP posted to a document that was/is modifiable by anyone who can access it - so jerks started messing with it.
Tought so, but now it says it's "too popular" and some features have been disabled, so it should be "solved" -- I definitely didn't see anything weird in the document.
I didn't see anything odd either.
That's good, when I saw it the whole document had been defaced.
Yes, now read-only.
Yeah, when I had replied it was unreadable as all of the text and been crossed out, random edits introduced, etc.
If it's not 'too popular', it defaults to 'suggestions' mode, which will show all the vandalism -- switch to 'viewing' mode, and you'll only see the original doc.