Absolutely. Those bicycle riders should obey the law.
Just the other day I saw a bicycle rider almost fail to yield to a pedestrian at a crosswalk. You would think that since everyone else in Northern Virginia promptly obeys the requirement to stop or yield to pedestrians at a crosswalk, a bicycle rider would too, particularly since Virginia law considers a bicycle rider at a crosswalk to have all the rights of a pedestrian. [http://leg1.state.va.us/cgi-bin/legp504.exe?000+cod+46.2-904 and
http://leg1.state.va.us/cgi-bin/legp504.exe?000+cod+46.2-924]
I also saw a bicycle rider almost surpass the 25mph speed limit. Above that speed, his momentum could possibly have been deadly to a child or pedestrian.
While bicycle enthusiasts may complain that car drivers kill many thousand times the number that bicycle riders kill, (in 2009, 33,808 to a handful, the number was too small to be tracked by the Census)
http://www.census.gov/compendia/statab/2012/tables/12s1106.pdf, and that the health benefit to risk ratio is very favorable to bicycling (77:1, according to one study
http://www.bmj.com/content/343/bmj.d4521), that should not prevent 100%, zero-tolerance enforcement of all traffic laws, particularly those dangerous ones like speeding, not yielding at crosswalks, signaling, and coming to a complete stop at stop signs.