I put out 2 fires at the Big Game. It wasn't even really dry either- it had been quite wet that morning & the plants still caught fire.
I think during high summer it would be a hazard.
But in winter it'd be ok.
I saw more than one last year when marshalling as well.
Last year though one was caused by some kn*b bringing an actual army issue smoke grenade. Put it in a barrel of water in the end to stop it after 5 mins of choking, & the b*stard still kept going
. Funnily enough no one wanted to own up to that one...