> They have caused me numerous spills and scraped knees (due to the rear wheel locking up and skidding out from under me) and have done the same to my kids.

Skill issue ;-) My first bike I learned to ride on was a BMX with coaster brakes that was part of the fun! Rip down the street then slam the pedal back to leave skid marks. And who didn't love slowing down a bit, then slamming the coaster brake while turning the handle bars to do a sick rear sideways skid. My next bike was also a BMX with a rotor and front/rear pegs. That lead to way more spills trying to do stunts on the pegs or spin the handle bars. Never got good at the stunts part.

Might have worked better for a smaller, lighter me but I would like to give coaster brakes a go again on a proper sized BMX.