I don't know if this is the proper place for this but there was a recent news story about a couple in Germantown, Pa. It seems they had a verbal altercation with the woman's ex-boyfriend and afterwards got on their bike and rode away. The neanderthal boyfriend followed and rammed their bike with his pickup truck. Both of them were killed and he is now facing vehicular homicide charges. A witness to the arguement said he intended to kill them.
So bear in mind that there are a lot of unstable people out there.... and 4 wheels beats 2 in a crash.