As the WallStreetBets saga that has so captivated both Wall Street and social media has come to its roller-coaster conclusion, brokerage platforms such as Robinhood and TD Ameritrade now have the legacy of restricting trading of high-volatility stocks. But while brokers are attempting to address the problem on their own platforms, it’s possible that pro-regulation advocates could see the fracas as a mere opportunity to advance the burdensome regulatory agenda they've wanted to advance for years.For the uninitiated, the current situation arose from a popular Reddit forum urging its users to target GameStop (GME), a stock heavily shorted by hedge...