Oil fill cap with key or tamper proof ?

[johnnymotocros]

I was writing a reply on the oil change thread, and realized that the oil fill hole on my bike is the perfect place for somebody to mess with my beloved HM. I park the bike on a public place every day, and I don`t have any enemies that I know ( except x-wife ), but some "jocker" could throw a bad joke on my bike and make my life very sad.
Are there any products or ideas, like a plug with a VERY special shape for a tool, or a key type fill plug for the HM ?

[Borracho]

The only ones I know of use allen wrench/hex key to open. It would stop someone with no tools, but if you happened to have those tools; you screwed.

http://www.motowheels.com/italian/my...rcycle%20Parts

[GHEZZI]

Just tie it up with wire, to keep the show on the road, true blue.
John Williamson.

Seriously, if you used tie-wire like they do on race bikes, what would be the chance of a vandal having that in his kit to re-tie it. You would now have instant proof of tampering before you started the engine.

[bullet3z]

I have never heard of anyone putting anything into any motorcycles oil. Most people would have no idea where you add oil on a bike. They could just kick the bike over if they wanted to do any real damage.