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I think this will pass, as a reaction grows via a few high-profile incidents of upskirters getting their asses kicked by pissed off victims/boyfriends/bystanders.
Also I expect awareness to grow and women to be encouraged to speak out, as with other forms of sexual assault. Eventually we will look back on this like we do with suicide hijacking -- an offense that can only be committed because people aren't prepared to recognize or confront it.