Promiscuity is a social problem derived from the faulty personal choices of the idiots who practice it and promote it. It is not the personal problem of anyone who wants to stop it, although we could argue it is an indirect result of many bad personal choices on the part of bad individuals.

So isolated individuals shouldn't try to do anything to stop Chad. As an isolated individual, even if some deranged vigilante were to exterminate a hundred Chads, there would be plenty more to take their places. It would be like fighting a cockroach infestation with a butane cigarette lighter and some flammable liquid -- highly dramatic, but absolutely unproductive in the long run.

If you want practical social action to correct the wrongdoing of promiscuity, then you need collective action, and for practical purposes, you probably need religion. Are you prepared to actually live your personal life according to the painful constraints of religion? Maybe you are, maybe you aren't.

Chastity may seem like a good idea, but the fact is that human populations must breed, and pair-bonded sex is the practical way to produce human babies. An ideology that promotes childlessness will die out in a few generations.

I do not endorse pro-natalist religions (such as Islam and Mormonism) but I fear that they will gain undeserved social power because their adherents tend to have grandchildren.