Ofcourse not. ICO's nowadays are everywhere and it's really hard to find evidences about any scam ICO's.
Remember Coindash? Bitconnect? no one knew that it was a scam until it's too late. (Well maybe a few people)
but the point is, some scam ICO still has all the check points despite their very dubious plans to run a away with your money.
Some even have great reviews on ICO Listing sites yet turned out to be a scam.
People (not only the bounty manager but also the bounty hunters and the whole crypto community) has to be very vigilant nowadays.
Always do your own research before joining a bounty campaign or investing into an ICO. Do not just jump right away.
Remember:
If you get scammed. It's your fault for being a fool.
So blame yourself.