I start deadlifts with the empty bar. I have no problem deadlifting with smaller plates. Sometimes I warm up with some air squats before I squat the empty bar. Depends how stiff I feel. I otherwise trust the warmup sets to warm me up. I don't care what other people do. They are younger and stronger and who knows what they did before the walked into my view in the weight room.
One of my buddies was really bad about not warming up if his brother or I didn't make him. This all ended when he tried pulling 635 cold. He's still not fully recovered from it. Sad, cause he's a genetic freak, and switched to body building since he can't pull heavy right now.
You're not really very familiar with the relevant muscle physiology at work here. Brooks and Fahey is your next project.
One "cools down" from a heavy set of deadlifts by not deadlifting any more until the next workout. And stretching is vastly overrated.
What does the best, most recent scientific literature state about stretching pre-excercise? Even post-exercise, stretching has not been conclusively shown to have a benefit. Stretching is most beneficial to someone who has a muscle length impairment, or for very specific persons / athletes that require an obscene amount of flexibility (read: gymnastics). If you want to get right down to it, in the absence of a muscle length impairment, stretching actually reduces performance. Vertical jump, power output, and strength have all been shown in recent literature to be inhibited by pre-workout stretching.
You don't believe doing a warm-up progression from light to heavy aids in blood circulation? What is stretching doing to promote "lactic acid breakup"? Further, what the hell does lactic acid breakup mean? Are you arguing that lactic acid is detrimental to performance?
I'm pretty average on the bp, but after a set of squats I'm more than warmed up and don't really get anything from warming up w/ less than 135. I still do 3 warmup sets, I just start w/ 135. Same goes for DL. On the rare occasion I do an exercise by itself, then a full warmup is in order. Learned the hard way about going too fast w/ pulled hams and other parts.