While there are obviously dangers to meeting up with people you get to know on the net, this is just another way of meeting people and the same dangers exist elsewhere, like if you meet someone in a pub or club or through the dating ads in the local paper.
Thats the point though, it can be very damaging to men. Men can be vulnerable too and some men can be damaged beyond repair by female internet “nut jobs”.
The main female weapon is the false accusation, or even the threat of a false accuastion.