After many races I can only conclude that the penalty system was designed by BMW drivers. If you flash your lights first, you have the right of way and any car must get out of the way. If you're DR.B you also have the right of way as BMW starts with B. A stands for arsehole so is always wrong. Yet to make it not too obvious the game will often tell you the other driver got a penalty (as well) and even show a flashing red sign above their car, only to laugh in your face at the finish when they have no penalty at all.
However PD gives you plenty opportunities to join the superior lower ranks of DR. Stop worrying about the bomb, embrace the DR reset, resistance is futile, the house always wins.
Here's one of those bonehead moves endorsed by the penalty system.
Lap 12, I've been following this DR.B driver for over 2 laps, him defending hard. So I aim for a faster corner exit to safely pass him on the straight. He goes wide, I take the inside line, apparently he needed fuel like I can read his mind. I get 10 sec penalty, SR Down, I serve it on the straight, he comes out of the pit 3 sec ahead of me, penalty scrubbed and his tank topped up.
Can't enter the next race, serve is undergoing maintenance. I guess I'll stay SR.B for another day.
Edit: The server fixed itself just before the entry deadline. Made it in, weird room of 15 with D/A on pole, me A/B in second and down to C/E in the line up. I finished in first 15 sec ahead, fastest lap, and jumped to SR.S in one race... I didn't overtake anyone, pole drove himself off in lap 2.
Everything wrong with the SR system in two races!