Vape pens doesn't bother me when applied to eGo types.
Calling vapour (esp exhaled) water vapour is probably at the top of my list. It's already harmless, no need to keep people ignorant with misinformation.
Calling vaping smoking is another for obvious reasons.
Calling juice (or e-juice, or e-liquid if you prefer) oil is another. Last thing we need is to make people think 1. hash oil, or 2. vaping oil is OK (It's NOT).