The MTV reality show "Catfish" introduced audiences to catfishing, or using a falsified online persona to hoodwink people. Catfishing typically involves romance, but a new Business Insider article tackled a variation called "housefishing," a trend that has proved frustrating to prospective homebuyers and real estate brokers alike. Although the housefishing label appeared to be new, social media users might already have seen egregious examples in…