I guess I'm lucky then. I see one about once p/week. I farm materials in CZs, so it's not terribly unusual. I usually leave due to lack of productive targets and Chris Simon's "filthy kill-thieves." I'll stay when just occasionally both federal and imperial capitals show up. It's a nice fireworks show, the first time one sees this. The target numbers are still low-ish, but the battle is more balanced; therefore less "filthy kill thievery."
I haven't seen a capital spin off into the wild black yonder at +600 mps, in some time now. I can only assume FDev was finally able to capture and incarcerate the Monty Python crews responsible for those "runaway tactics."
Edit: My home system is near the center of the bubble where most of the powers meet/overlap. It might be a good place to look for them and possibly a reason why I see them regularly.
Rooks o7