Investors and bounty hunters are mostly required to undergo KYC while the team behind the project itself are not known. And they scam people. I suggest the team should first pass a "KYC" test and publish it on their website before investors and hunters are also made to do same. What do you also think?
I know where you are coming from, I have joined campaigns that don't give a damn about investors and bounty hunters. However, I don't think there is a way to check a team's validity. They could easily pay third-party verifications just like what you see in most ICO review sites. Your best bet is, as always, is to research all the things they present and pray that the team are not heartless scammers.