Was I out of line by telling a co worker he shouldn't be vaping inside?

I work for a furniture store and there was this 18 year old kid I was putting a couch together with. He was babbling about something, then mentioned his vape. He pulled it out, and took a hit. I told him he shouldn't be vaping inside. He said nothing. Shortly after he went to go get lunch, and I was talking to our manager, and almost brought it up to him, but in case he had the same mindset as the kid, I didn't wanna piss anyone else. I put in my two weeks notice today, so im probably gonna tell our boss on our last day. I don't think I was out of line. I probably should have done more. What do you think?

Was I out of line by telling a co worker he shouldn't be vaping inside?
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