Pro tip: running red lights and hitting pedestrians who dart out in front of you will prevent hard braking demerits and not count against your safety score.
Hitting a pedestrian, or especially another car, because you run a red light, will cause deceleration, which would cause a demerit on your Safety Score. Plus which, if your car is totaled and/or you're in jail, you won't be able to "enjoy" the experience of babysitting FSD-on-city-streets as it fails to slow down for construction crews, misses turns, takes the turns it doesn't miss very jerkily, etc.
In other words: Stop sweating it. The current FSD beta is
not worth getting excited about -- at least, not from the perspective of somebody who wants a useful feature. (It is an impressive technology, but it's not yet a
useful feature.) The Safety Score is an imperfect, but pragmatic, way for Tesla to control the expansion of the FSD beta program. Tesla owners should
NOT get too invested in managing our Safety Scores. I honestly wish that Tesla hadn't made those scores public, because, IMHO, too many people are paying too much attention to them and using them to game their driving styles in ways that often degrade, rather than improve, safety.