My advise to bounty hunters:
1. Don't participate in any bounty without escrowed rewards.
2. Don't be in a rush to participate in every bounty that comes up.
3. Follow only trusted Bounty Managers.
4. DYOR on any project and don't rely on BMs. Most of them don't even research a project before going into contract with project team.
Highly agree, especially to number 1.
Bounty hunters should always participate only to bounty with the escrowed rewards, most of the time, bounty campaigns always try to run before they even launched without giving the rewards of the bounty hunters. They always take advantage of their work and continue doing it over and over again.