Well, I prefer not stressing about all the things that might be remotely possible to do us harm in certain circumstances, I guess. Not putting my head in the sand, and I take reasonable common sense precautions, and am very aware of safe usage of proven harmful or toxic items, but the 'could maybe possibly do some kind of harm' thing is a damn long list, and it includes pretty much everything around us on it. So, personally I think stressing about things like that is probably far more harmful in the long run than the thing you are stressing about will ever likely turn out to be, but hey, to each their own.
That said, there's certainly no harm asking, all the same. The belief that you shouldn't worry isn't the same as saying you shouldn't ask.
Anyway I was just trying to make light, so don't mind me.