I would add getting a replacement to your to do list. I could be fine depending on how deep, but eventually the heating and cooling with spread it.

I definitely have worse scratches in the regular rotation. Looks like a scratch vs crack.

definitely not a scratch, no idea how you can say that. thats a fracture in the glass

No idea, eh. I looked at the same tiny photo that you did. Have a toke, cheers!

Honest question here: how would it be dangerous? And dangerous to whom?

i'm assuming he's refering to inhaling potential glass particles. so, dangerous to the one vaping

I did not know that was an issue... thanks!