A biker hitting you is likely to be much slower speed, and much less damaging since most bike riders are softer than the average SUV (getting hit by Lance might hurt). Bike paths are always zoos on the weekends and other busy times, and yeah you're kinda being a jackass, not intentionally so, for expecting them to be rational and safe places given how many people just don't know what they're doing. At least they're getting out there on 2 wheels. In a rational society, bike ed would be as common as driver's ed in the high schools, with courses also available to all ages at the local community centers.