My friend Carla saw a guy in a red Jeep blow through the fee station at Lake Tahoe last year... She said he just waved and kept going like it was nothing. It really got under her skin because she pays every time. She actually called the park office the next day to report it.
Stuff like that happens everywhere now, not just parks. See it when people cut in long lines at coffee shops or take way too many free samples at stores. It's that same mindset where they think rules are for other people. Makes you wonder why some folks bother following anything if others just skip it.