that's exactly why I want this kind of feature...
Now grant it, it'd be play money at first... but if you put a trade up there it is going to effect your ranking... and if you don't sell it and pump the stock (on your profile), and dump it for real and the stock tanks, your rating will go down...
it really would stop the pump and dump... you are never going to stop people from lying about the dollar amount they put into a stock. but this will give you a real idea of when they actually bought the stock... when they sold... and it would not allow for people to BS you... and if they did it would only hurt their rating...