So, don't join a bounty or invest in a project because of the bounty manager. Do your research before investing your money or time on any project.
Are you saying that all the participants of the bounty do not conduct research?Bounty participants have become much smarter and now just to attract them to a bad project is almost impossible.
Being a bounty hunter for sometime can give you out some experience and you would be aware on how scam project works but falling out into projects which you do see like legit one but ending up to be a scam is still on high probability.Projects becomes too real and hardly be recognized as fraud if you dont dig much deeper.
Considering on following bounty managers,this doesnt guarantee anything yet even these manager no matter how good they are on handling people they can point out which one is legitimate.