Main Banks of the ESS can be broken into and stolen from! Post screenshots of your catch. Big, small, doesn’t matter!
Getting them out is annoying, either you have secured a nice path back to Empire space, or (if you’re lazy like me) just use Upwell Delivery to drop the bonds in a structure and Asset Safety them away to low sec 21 days later. Pull 'em out, contract to a neutral alt, and then haul them away.