Re: Laser blast from the past
If they were to take this seriously I can see many possibilities, it really depends on how well the adversaries birds are hardened. Ideally they would be vulnerable to a directed energy weapon fired from a very high altitude plane which would kill enough electronics to render it useless but not cause any debris, but I doubt if it would be that easy. (Tracking things in space from a moving aircraft is a solved problem, look at the SOFIA telescope.)
Kessler syndrome is still an issue. if sats are non-destructively killed, it's very likely that eventually there will be a collision because dead sats cannot make avoidance manoeuvres.