That’s not speeding, which means recklessly driving like a madman - and 20 mph over is not a small amount when the limit is 55.
The „it’s not illegal if everybody does it“ defence also isn’t going to help you. Because it’s the slipperiest of slopes.
I go over the limit sometimes, too, and when I get caught I pay the fine like an adult, instead of making up childish excuses why it was actually fine to do so.
And anyway, the fines are adjusted by how much you went over, if you just slightly go over, it’s cheaper.
So in summary, you’re an idiot and I hope you get caught doing something really bad soon,