It is quite unlikely that this woman has the training or experience to understand the "most" flashers do not approach or make physical contact with their victims. It would not be reasonable to expect that she would. On the other hand I think a reasonable person would not fail to understand her being in fear for herself and her child. Especially the child.
As for the sex offender, I can give you examples I am aware of of flashers absolutely breaking the mold and attacking their victims. Unusual to be sure, unheard of, not much.
"A Liberal is someone who doesn't care what you do, as long as it's mandatory". - Charles Krauthammer