I was curious about that too.
It is going to be bonded incidentally along the way several times so that ground loop thing is meaningless.
I know on some transmission lines the design goal is to only bond the braid on one end so it doesn't carry eddy current but when you are talking about CATV they get bonded at the pole, the ground block/surge protector at the house, the splitters (if you use the bond lug) and maybe even the cable box. I haven't checked the point of use protectors but I wouldn't be surprised if they bond the braid too.
