Having attended a traffic school run by a couple of highway patrol officers (you get more local info out of them than an online school, imo), I did glean a bit of knowledge that may help others. Here's some points made:
Question about "Who gets pulled over?"
Cop 1: "If there is a group of cars speeding, I will pull over the last car. My reasoning is if the other cars' weren't ahead of him, he would go faster than the rest. Hence, the tail-gunner gets the ticket."
Cop 2: "I try to get ahead of the pack and pull the leader over. I've also pulled a pack of five vehicles over at once and issued five tickets. I seemed to be called 'Cowboy' at times - sometimes other names too I'm sure."
Question about "Grace (tolerance) for traveling over the PSL?"
Cop 1: "I don't allow it at all ('I'm told to say that' with a big grin). However, I set my 'tolerance' at 10% of the PSL. Many have the assumption that 10 over is okay. No it's not. If you are in a school zone, 10 over and you will meet me. Figure 10% and maybe you'll get by at 27-28. Hit 30 and you will meet me. Go one over in the rain or sleet and you will meet me. I've stopped people even going 10 under the PSL in the fog which is worse in my book ('Unsafe conditions')."
Cop 2: '"On the highways, I also play the 10% tolerance, sometimes less if traffic is flowing well. It really depends on my mood too. I have issued a ticket for 1 over as the guy went off a bit about it. I've also played cat-and-mouse with guys with radar detectors where they stab their brakes when I trigger the radar gun. It's fun to watch them keep stabbing their brake lights for miles, but they soon meet me too."
Question about "Weaving to pass?"
Cop 1: "That gets my attention and is easy to spot from miles back. If you want to draw attention to yourself weave through traffic. Our site lines are pretty good between lanes."
Question about "Why won't you (the cop) answer about cost of the ticket?"
Cop 1: "Jurisdictions have a lot to set as to what they collect and add to a fine. A $100 fine can cost close to $500 now in California. A good explanation of the costs are shown here ( http://www.kern.courts.ca.gov/pdf/where_money_goes.pdf ) for Kern County (in California). Cross a county or city line and it can change by a lot. I won't discuss it because they will come back and say, "The cop said it would only be a hundred dollars, not $500!)." "Highway patrolman cross a lot of jurisdictions and I don't keep track of all those fees. A local cop may though." Your cheapie seat belt or cell phone ticket can go out of sight now.
Other things gleaned:
At night when stopped, turn on your interior light and put your hands on the steering wheel to diffuse the situation a bit. Might save you a ticket.
Arguing with the cop is a big guarantee you'll get cited. He's already decided in the first 20 seconds of contact if you will get one or not.
Do not install hubcap "Spinners" on your wheels. He may see them as "A failure to come to a complete stop" (i.e. "Wheels were still spinning" indicating rolling) and cite you for them even if you think they look cool. Judges seem to like hearing the cop say "His/Her wheels were still moving at the stop sign. My (cop) argument trumps yours more often than not."
Others were one cop sometimes puts a wet paper towel from a service station over one headlight at night. Then he follows a car on the freeway. Often they will figure it's not a cop and speed off since the headlights seem different as "It can't be a cop." Once heated up, it falls off when stopped and he likes their bewildered expression.
Another will play "broken down" with his hood up and watch traffic pass him and speed up (often pointing and laughing at him). He uses his radar or laser to bust them after they pass a ways. He just slams the hood and takes off in pursuit.
Another was "Do not overtake a cop traveling at PSL, especially if you two are the only ones on the highway." You gaining on him will allow him to pull over and get behind you and cite you. He said, "He watches for people following him (seems paranoid a bit?)." Follow him too long and the tables turn. "Do you like being followed 5 miles by a cop?" Same thing, but reversed and he has a badge and a bunch of tickets to get rid of.
Get a lawyer if you want to try and fight them these days as the legal system needs money to run. Often, if a lawyer appears on first court appearance for your plea. Then the cop will probably not appear on the second trail date and it gets tossed. Sometimes, the cop may figure "You may be at the end of your ticket rope" and let you skate with a lawyer (as with some commercial drivers who need their job). They figure you paid maybe twice that for the lawyer and chalk it up as "You learned your lesson. Now behave."
It really is a game to them, so it seems.