Hopefully you're not referring to the Mythbuster's video. Their "proofs" often leave a lot to be desired, IMHO.
Tracer are often banned from ranges as a "just in case" measure to make sure they don't start fires. Is that proof? No, just wisdom.
No Mythbuster video here....
I don't remember the name of the video. But, I could dig up if it important.
I am sure everyone has seen it by now... It's one were the 2Nd Chance guy shoots him self while wearing a bullet Proof vest with .44 Mag. Then shoot some Bowling Pins.
They shoot tracesr at a gas tank with 50 cal.
Not until they rig a flame over the gas tank does it light up.
It's kind cool the watch if like to see what happen when you fire a round at stuff.
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My botten line is.
When you hear the Meda say "The fire was started by target shooters in the area"
Call then up or email them. Ask "Just how does that work?"
Other wise we will be losing our pulbic lands to shooting for ever!!
Don't let the B****** win.