The question is : What would you change or might add to make it more reliable or interesting?
The comments above made a lot of logical solutions, but the only way to do that is to raise awareness.
If people dont participate in these campaigns until they have escrowed their money, "which means BTC or guaranteed altcoins," the number of such campaigns will decrease significantly and thus scam one.
The development of rules may be useful in limiting those campaigns, but there will be a lot of ways to get around it, which will serve for more spam.