I don't think the SEC is smart enough to understand BTC, yet. What is this, insider trading? Given that you can't buy stock for BTC officially I am addressing a particular gap and inefficiency. Also, I am using my money that my money I currently have in the market. I am not violating any laws accepting bitcoin from community members, and using my money to buy stock.
The only real pitfall is taxes. I would have to pass down taxes I pay as fees.
I'm not talking about relating to BTC. I was talking about how you need to be a licensed broker-dealer to do this, and there are MANY nitty-gritty laws that you need to follow for record keeping, how much info you take, etc. Not to mention that this is almost certintaly against the broker's TOS (the one that you're using). You can't just start something like this; it costs lots of time and money to do this.
To the Bitcoin community: You should really consider the legal implications of using this guy's service before doing so. You might lose your money.