Best way for securing gas caps?

I know they have locking gas caps available, but that involves having an extra key to have to keep track of. Not really a "dealbreaker" per se, but was just wondering if anyone had any thoughts/mods on how to safely secure these.

 

Brazing

 

Dummy/fake lock?

Where do you live that you're worried about peeps stealing your gas?

 

Isn't the new thing to drill a hole in the tank anyway?

 

I think the concern too is to prevent someone from adding something like water to the tank, or stuffing a rag down there.

 

Think its time i guys moved.

 

Thats old school, just poke a hole in it with a stick.

 

I found that a good old .45 Cal hand gun with an extra mag clip works pretty good.

 

Stop messing with married women ........... just kidding
Other than the caps with locks will be something to secure the hatch.... not many options.