<... >

Nothing should be considered Off-Topic when somebody is giving warning against scam.

Mods might have deleted it because it is just an accusation without a proof. Might be if you included the proof and challenged the tread creator to reply in Scam accusation board  then I do not think they will delete it.

The post that is deleted simply look accusation/threat without any proof and I think Mods are right.

If a DT member is planning on tagging bounty participants because the project is a scam (or suspected scam), I'd say it's not really off-topic.  Don't know why something like this would be deleted.  Bounty hunters tend to not visit sections other than bounties, so it's not a given that they'd see anything in Scam Accusations.

Edit:  On the other hand, bounty hunters probably would still miss a warning like this, even if it's in a bounty thread they're participating in--doesn't matter what size font or color you use.  Take a look at how many sig campaign applicants miss "This campaign is now CLOSED" posts.  Maybe a standalone thread in Scam Accusations would be better anyway.

If the Bounty program itself were a scam, it'd be on-topic, though. IMHO.