Good Heart: if you really thought it was the right thing to do, you would not have posted this question.
A couple of girls I know, once asked a certain Rabbi if it would be appropriate to hand out reflectors to boys/men they passed while driving at night. (If you ever drove down a dark street on a dark winter night and almost knocked over someone that was dressed totally in black, you’ll understand the need for this…) The Rabbi said they were right that the men should wear reflectors, but it would not be tznius for the girls to give them out.