Corvids are also good problem-solvers and learn from local flock experience, so your local population might have innovated a behavior that isn’t common to the species in general. I have seen reports of crows putting walnuts under tires of cars at red lights to crack them, or using a plastic lid to snowboard down a roof for fun, but unhooking feeders so they fall to the ground and break open is a new one for me.
I rarely see blue jays at my feeder, and never any other corvid, but your experience shows that isn’t universal.
I did a quick search, and this post seems to say usually they only come to feeders with peanuts, but sometimes in spring and summer they will come to regular seed feeders. https://thecottonwoodpost.net/2022/05/02/the-maddening-truth-feeding-crows-and-jays-harms-other-birds/
Corvids are also good problem-solvers and learn from local flock experience, so your local population might have innovated a behavior that isn’t common to the species in general. I have seen reports of crows putting walnuts under tires of cars at red lights to crack them, or using a plastic lid to snowboard down a roof for fun, but unhooking feeders so they fall to the ground and break open is a new one for me.