Now back to your question.
I generally give a f**k about what other people prefer, but luckily here in Germany vaping is much more accepted than in the US for example, so I never ever got that stupid advice to go back to smoking from anyone.
If you’d wander through a crowded downtown blowing clouds like a madman however, people won’t be all too amused for sure.
But that’s more because you’d be highly disrespectful towards everyone else.
Your freedom ends when the freedom of others is concerned.