I have a hard time feeling empathy when I see a roadside memorial... I inevitably get it into my head (despite that I don't know what happened) of my thinking the person killed was doing something stupid enough to get into an accident in the first place.
You know, drinking and driving, talking on the cell phone, TEXTING on the cell phone, bending down to pick up something, driving with your knees and not your hands... that sort of thing.
--In which case I'd rather see something on the memorial site that can act as a lessen to other would-be-eejits and warn them not to do the same. Not a "remember this person who died here", etc.