&quot;If the assailants had been required by OfferUp to provide even the most basic of legitimate personal information then things may have turned out differently.&quot;<p>The writer&#x27;s conclusion that OfferUp should be doing background checks on every seller doesn&#x27;t seem scalable at all.<p>That said, the AirBNB model (authentication with social media, use of real name in listing) would be a big step toward user safety over Craigslist.