Can we really safe ourselves from this people, anyways we can be careful enough to avoid them and their trick though. We should make sure we read well about any bounty we want to do so as not to fall victim of their many tricks. We should also ask questions about any bounty we want to do too because this people come with fake bounty most of the time
You are right, in the past I saw a number of people starting a campaign with their fake accounts but when I asked from the team members then they denied. It means that we have to remain in contact with the real team members of the project to stay away from the scammers.