USA TODAY - Feb 20 - One in five women say they have been sexually assaulted while in college, according to the National Sexual Violence Resource Center. The growing awareness of sexual assault on college campuses prompted California and New York to mandate a "yes means yes" standard for universities, meaning if an agreement to physical intimacy didn't happen, it wasn't consensual. We-Consent and Sa-Sie were among the first to attempt a digital solution with apps that allowed partners to check "yes" when they agreed to sex. Now, LegalFling is joining the consent-by-click market, with the added cachet of being blockchain-based. Ari Moskowitz, an editor and novelist, says he thinks it's "a cool idea, theoretically" although he foresees practical issues. ("Hold on, lemme charge my phone so you can sign a contract!") Also, someone who is coercing a vulnerable person into sex will figure out a way to coerce a click on the app first. But the real elephant in the room is that consent can change.