Other than Reddit style white knighting why did you say this?
You are basically defaulting to the OP is to stupid to know helmets are one use only, which is common knowledge.
This is a post intended to tell people to wear helmets in the first place. I don't think the target audience is likely to be aware of that tidbit either.
Personally I'm a firm believe people who assume others are stupid without proof are the real stupid ones.
It was white knight style, lets get karma and pretend OP is to dumb to look after themselves, I'll be the hero and give them condensing advice.
No mention of helmet reuse was in the original post at all.
Completeness is a Good Thing, it's unclear why you're bent out of shape about it.
Other than Reddit style white knighting why did you say this?
You are basically defaulting to the OP is to stupid to know helmets are one use only, which is common knowledge.