Q: Do you moderate/delete (possible) FUD, accusations and untrue information?
A: No. We don't have enough time to check every single piece of information and verify the validity of the sources. Also, just like scams - too much room for bias and abuse.

However, trolling isn't allowed. If a user is habitually posting obviously false nonsense ("obviously false nonsense" to an outsider, NOT to someone who follows or is involved in the discussion) just to stir up trouble, then it's considered trolling, which is prohibited. Such cases should be thoroughly documented in the report though (There are tons of reports that just say "trolling", but moderators don't have time to look through each user's post).

When it comes to accusations of commercial misconduct, if a user is accusing you / someone else of scamming or defrauding them in your / someone else's sales thread without providing evidence (either in the post itself or by linking to evidence elsewhere), that's considered low value and thus should be reported as such.