When the Securities and Exchange Commission announced last Friday it was slapping Goldman Sachs Group, Inc. (NYSE: GS ) with fraud charges, Wall Street - facing financial reform - took a big gulp of reality. Scores of traders hurried to sell off Goldman shares, causing the stock to sharply fall 12.8%.   Meanwhile, spectators on Main Street cheered the thought of a financial giant - that has faced scrutiny for housing market investments, executive bonuses and bailout money - finally having to face the firing squad.    Money Morning readers' comments clearly expressed their negative feelings toward Wall Street, our government and the SEC: "Crooks, political snakes, fraudsters, soulless and self-interested leaders, running a corrupt nation..."