When I was a youngster, the cops would stop me for whatever infraction, and I was always very polite to them. I went from seventeen to twenty five without getting a ticket. Sometime after that, I started getting tickets every time I got stopped. Nothing changed but the cops attitude.
The last ticket I got was for passing on a double line. It did not happen, but the cop came to my home FOUR days later and gave me the ticket.
The Judge, like all tyrants said I was lying and fined me $170.00. Like it or lump it. I paid, because it would have cost me more to fight it, and I didn't think I could win in the same corrupt Courts.
That seems to be the situation nowadays. Cops have more attitude, and some are overly aggressive (no "Serve and Protect" attitude at all). Thing is, it depends on what motivated people to become cops. For some, it's a family tradition. For others, it's a sense of being superior to others and a way of lording it over regular folks.
Some of the guys I hung around with in my teen days were punks, getting in trouble and going no where in school or dropping out; they became cops. One of my brother-in-laws was like that, we were roommates when young before he joined SFPD. He would tell me stories of them beating people for the fun of it. Thankfully he grew out of that later on. Other guys thought about protecting people, but got sick of the police attitudes and quit the force. Happened to another brother-in-law, he couldn't stand the way people were treated by his fellow cops in SFPD so he resigned. A lot of crap is dished out by rookies.
Seems to be too much intimidation attitude these days. Been luckier with judges. When I fight tickets usually the judge nods in agreement that a cop is a jerk and dismisses the ticket.