If enough women start to do this then the idiot men who do this kind of stuff might stop.
That is VERY bad advice for a number of reasons.
1. Some men may flirt but may not be trying to "date"... some women would be quick to assume... destroying a household isn't worth it.
2. Some men would go after them with revenge in mind.
3. Their home life is none of a potential "date's" business and she may not know all the circumstances. She can just say no and leave it at that.