RacerX said

"3. in an accident, road rash DOES heal faster and less chance of infection
4. Scrubbing out road rash (one of the most painful experiences on earth) is less painful and more beneficial"

Please be sure and write IMHO next to statements like that, unless you have good evidence that what you are saying is fact.

As long as you keep your wound clean, the presence or absence of hair should not significantly change your chance for infection - after all, scalp wounds don't have a higher rate of infection than any other type of wound.

While we are on the subject of wound care, pressure irrigation is the best way to cut down on chances of infection (saline is best, tap water will do), GENTLE scrubbing in order to remove gravel and such is also beneficial. But be careful not to further abrade healthy skin with overly vigorous rubbing.

Peace
BK