It seems like this is a problem for a Space Force. I think some research into a space vacuum would be a good idea. You could use reverse GPS to move a catch vehicle into position, then catch these pieces of junk and remove them from the system. It doesn't seem like it would be that big a deal to achieve working with Space X and maybe using the x37b to raise a mast that could fire a counter burn as it approached and then pull it in and head home. It's gonna have to be done sometime, so now sounds like a time. If I had input in that arena, I would reschedule missions to look at this intercept type before it becomes bumper pool up there with Russian space junk. Kevlar bag on a mast. How big is the piece? What is the velocity and ballistic energy? How strong does the Kevlar bag have to be? Can the x35b carry a mast large enough to do this? Seems like its more of a job for the old shuttle program. Maybe make an old shuttle autonomous. use it for catch missions. Just a thought. Also, maybe look at using some sails between two or more rockets to effectively create a filter for certain high-traffic altitudes.