It's not that there is no one preventing scams anymore it's more of the central topic of the forum right now is fighting spam. It is just the current trend. Of course preventing scams are still top priority, but right now people are just really hyped up about the new system that has somewhat effectively curtailed the entry of spammers in terms of stopping the account farmers to easily create new accounts and level them up.

About the ICOs, well that's another thing. Usually, most of the ICOs look legit on paper or on its face, and no one can really produce evidence that would cause people to turn those away. Usually the forum fights scams if there is proof of such, but there are ICOs that turn into a huge scam when from the onset they have perfectly executed their plan.

As an investor you should really be diligent in your investing. You can't really be investing in every ICO that comes up, can you? There are a lot of ICO that seems rubbish from the start anyway, and if you carefully scan them you will clearly see that there are only a few of them that you should consider. Sometimes it is just a matter of the gullible being tricked because there were already a lot of signs that it should have been avoided but ignored and not because the forum was not vigilant.