If it was odourless why can I smell it? Believe it or not not everyone is a fan of sweets and lollies. Keep your pong to yourself.
Do you say the same to people who wear too much and/or shitty perfume/deodorant/cologne, or have bad BO? Because I run across a lot more of them than I do people who vape at all, let alone people who vape indoors. That's not touching on the stench and health effects associated with cars.
I always make sure I'm a good distance or downwind of people when I use my e-cig out of general politeness, I never use it near children, and unless I'm at home I never use it indoors (more because it's not worth the effort of triggering some anti-smoking fanatic who can't tell the difference than because I think it would have an effect on anyone) with the exception of nightclubs (well, I don't go clubbing much anymore, but when I did), on account of anyone at a nightclub complaining about a little nicotine in the air (which disperses within seconds) needing to check their priorities.
Honestly, you could probably get something absurd like 50mg/ml of nicotine and a 0/100% PG/VG (ie, maximum vapor output) ratio in your juice, while you're chain puffing on the ecig then blowing the vapor directly into someone's face from a foot away, and I doubt it would do more than maybe irritate their eyes unless you're in a small, enclosed space (one of those tiny 2 seater cars, or a photo booth, or under a blanket or something). And even in such an enclosed space, you'd probably OD on nicotine before the other person started to feel the effects of the vapor being exhaled.
I've been in a friends tiny home office for hours while he vapes constantly on this massive lightsaber-ish thing he has, with near the maximum nicotine quantity they sell premade, and never felt a thing. Hell, you can't even smell it after a minute. It's honestly a non-issue, a holdover from our generation being raised with the knowledge that cigarettes contain nicotine and that cigarettes cause cancer, without people stopping to think and separate the two facts.