5 Star Honeypots are a good idea
There is a lot of garbage in the system. Undeniably. And we know that Niantic occasionally includes Honeypots which - at least for the instances I know of - are extremely bad and supposed to be rejected.
This does a good job of preventing people from accepting everything. If you accept everything your rating will drop to poor in no time. However the other extreme of rejecting everything to farm upgrades does not get penalised by this system. If a player rejects everything they at least get all the honeypots right and therefore will remain at a good rating for longer than the player who accepts everything.
I think in order to counteract such behaviour Niantic should include some nobrainer 5* candidates into the honeypots.