Check with your state securities department. In Ohio you are exempt from a Series 65 unless you are under 15 people, however it is suggested
you register with the state regardless.
Make sure you inform your customers of the risks involved, it is suggested they only trade with risk capital. Give them a disclaimer and do not make statements that could be regarded as misleading. These are the issues that get people into trouble. Check with the securities people about proper reporting to the friends and family, for instance it might be necessary to provide monthly reports or audits.
Read the CFTC enforcement press releases and you will find which issues get people into trouble.
http://www.cftc.gov/PressRoom/PressReleases/EnforcementPressReleases/index.htm
Keep in mind that the CFTC controls commodity and Forex trading, whereas the SEC controls the other instruments.
Personally I think the people who show up in these enforcements are either criminals or delusional. What gets people into trouble is usually:
1/ outright fraud (despite the Madoff scam, people are still falling for this)
2/ these people are not registered
3/ make misleading and fraudlent statements but the issue of the misleading statements is due to the intent of fraud in my opinion.
From a trading perspective, be on the side of caution and try to use risk aversion meaning try to find the serious leaks. Every system has leaks but serious leaks are the ones that get people into trouble. Use proper risk management with the idea that being consistent and reasonable are the goals, these are necessary for survival. Use redundant systems (back up plans).