[pixelpoet]

One thing that makes my blood boil, and I've seen it in many countries I've lived in, is that people who vape tend to see it as being fine to vape e.g. on trains. Here in Germany people are vaping in the trains nonstop, and while it's not as bad as people dropping cigarette butts on the street (usually literally directly next to a bin!), it still makes it difficult to respect the group, given how shockingly common it is.

[bravura]

Honest question, asking for informed responses: How harmful is second-hand vape?

Littered cigarette butts don't biodegrade.

Second-hand smoke causes cancer and the smell lingers on material.

Does other people vaping near you in an enclosed space have a meaningful physiological effect or otherwise? Or is it just association with second-hand smoke that people decry?

[lm28469]

Even if it's 100% safe, which it isn't as are every other particulates you inhale, I don't like it, I don't want it. I don't walk around farting in elevators and burping in my fellow train commuters' faces even through it's perfectly safe, it's just basic common sense and politeness.

[consp]

The vapor droplets contain the nicotine and other dissolved particulates so yes. And there are numerous studies showing heavy metal dissolution into them. I avoid them like the plague.

[vladvasiliu]

Anecdotally, it seems to depend on the liquid. Some are very thick and give me an impression like I can’t breathe. Others aren’t so bad, but have an extremely vile smell.

I’d say I’m not particularly prejudiced against vaping in general, I actually do vape from time to time.

[droidist2]

> Does other people vaping near you in an enclosed space have a meaningful physiological effect or otherwise?

Yeah it makes his "blood boil"

[PeterStuer]

Honestly for most people their dislike of people smoking/vaping in shared areas is first about the smell, and only second about the health risk.

[doublerabbit]

> while it's not as bad as people dropping cigarette butts on the street (usually literally directly next to a bin!)

People are spitting on the streets here in the UK and it's disgusting.

But I've noticed it on transport here in the UK. They take a puff "cheeky-vape" then exhale it under in to their coat or in to some bag.

[Kinrany]

Could there be a device that would filter the exhaled air?

Make it a part of the e-cigarette, so that one can exhale back into the same thing or into a different port on it.

[cactusplant7374]

There is a filter type device for use indoors but it is standalone.