Service Panel Ground

I saw this service panel and was wonder if this is an acceptable grounding practice. I didn’t think it was. There is a metal clamp on the outside of the SP that is fastened to the sided of the SP. The ground wire is attached to the bottom of the clamp and goes from the SP to a cable box for grounding using the green screw.

As posted in your other thread…

You got it backwards. It is the cable box that is being grounded to the panel. In my area, this is not allowed. Cable and telephone must be on a separate ground rod from the home system (but may share with each other).