I will admit ive done my share of speeding. I have taken my car to 230km/h or like 140mph, only once, alone, on good tires, on a straight stretch of smooth clean highway, well known to me and empty. I would never put anyone in serious risk but myself. I dont remember what my rpm was, maybe 7800 in 5th, i was too anxious to start slowing down.
This was out of my own childish curiosity and to prove a point. Again it was only once and i have no intention to do it again.
I know a few people who attempt their top speeds in very questionable cars (or their parents) all the time, these are kids who have recently got their licenses (16-18) generally stuffed with their friends and loud music. Teenage tragedies happen too often.