When DD (15) was at school today, I found what looked like a vape pen in her room. A quick google search tells me that it's an anxiety pen and that it doesn't contain harmful chemicals (although there's no evidence for this), but that it's not intended for under 18s. DD does have anxiety, but obviously isn't 18. Do I bring it up with her or should I just let her carry on?
YABU - Don't bring it up
YANBU - Talk to her about it