Yep, I did no better than b/e when I tried it (16 years ago!) 

The problem with any long or short straddle scalping strategy is that you are saying the market has mispriced ATM VOL. That certainly happens over a short period of time, but you need a process to predict future actual VOL. If futures price movements do not materially exceed (for long straddle) the VOL you bought, fees and decay will bleed you.
