Is there any down side to using one of these:

[pgerhardt]

I picked up one of these whistles. I though it would be fun to use to let the pedestrians know I was coming when entering a show field. But not if it will cause problems with a good running engine. I am a little worried about moving the spark plug an inch above the combustion chamber and the fact that the adapter is made of brass (strong enough?). Any thoughts.?