Devil's advocate here.
I use entrance feeders regularly. I have never seen a hive with a feeder on get robbed before June. They are easy to change, easy to check, and you don't need to open the hive. After June 1st, I use them to open feed away from the hives. I also use top feeders, but not on hives I want to check often. Only on ones that will be left alone for an extended period.
Similar to bee bop, I put the feeder on the outside of the entrance, then block the entrance beside it, leaving only a small opening on the opposite side.