Listen mate, there lot of bounty campaign here. Im sugesting you to chose wisely, try to join a campaign managed by some profesional and experienced manager such as Sylon, Needmoney, Blockeye, Hotachy. Also if the bounty campaign require you to do KYC just do it as long it worth to do, but if they ask you to pay, just dont. i mean 0.1 eth is not small money for some people right ? We help them advertise by posting here or do retweet and tweet at twitter also like and share at facebook.
I used to join some random campaign when i was junior member, but now i only join good campaign, yeah we will never know for sure if the project will be scam or succes in the future, but we can reduce the risk by only taking good campaign. So follow my advice and be wise mate. Good luck for your next campaign.
This is what we should do,find the better one though its harder to find now,because they almost act as a legitimate one,they are great in copying or making most real.
Probably the most important thing in bounties is the ability to choose the right one without pink glasses. Most of the ICOs are failing...
but this is the hard thing finding them,betterlets be vigilant and be observant