A: The ticket was valid in the first place
B: The Speeding was reckless
I have a friend who got an entirely fabricated ticket claiming he was doing 80+ going uphill on an on-ramp in an early 90s toyota corolla with four people and four desktops + a couple of CRTs. We weren't going faster than ~35. Ticket said it was radar verified but he was sitting on his hood eating a sandwich.
Other times going the speed limit when traffic is going significantly faster is reckless (I'm looking at you, Atlanta). Cops in places like that love to ticket out of town/state plates.