Has anyone used collective2.com systems?

I saw these and they look like pretty good swing S&P500 systems

1) http://bob-dylan-swing-trading-system.collective2.com/
2) http://the-rolling-stones-swing-trading-system.collective2.com/

The bob-dylan one had two big draw downs of 17% and 10%. These are usually a bad sign in a strategy as a streak of these will wipe out your capital. It's just a matter of time (i.e. when not if) before you have a streak.