Gas Powered Commuter Bike?

The other day when I was on my way to work, a guy on his gas-powered bicycle pulled up next to me.

We nodded to each other and I made a right turn towards my office and he went straight.

So what are your thoughts on gas powered bikes? Do you think it defeats the purpose of bike commuting, or is it something that could help more people get on their bikes? I’ve spoken to a handful of bike commuters who think the 50-80cc engine kits are sorta like “cheating.” If you had this kit, you wouldn’t benefit from the exercise and it does let out emissions.