Okay, first, I looked left at your user name. No mad searching required

Second, your Op doesn't read anything like what you are now stating.
Maybe, just maybe it was your opening that Failed to get your concerns(do you actually have any?) across.
Now, I stealth Vaped at work. No, In writing, rules - but Smokers get ...... and it causes conflict. Employers do not like Conflict. Advocacy groups LOVE Conflict - see the issue? I also did so with full knowledge they may ask me to stop or even execute some discipline as an example of company stance.
You are certainly welcome to do as you see fit. I also have a right to an opinion and I do not believe ignoring an Employers Policy is anything to brag about. Changing Policy yes.
You might be amazed by the Regulations concerning ANY food product handling.
Surprise inspection and a violation can run in the hundreds of thousands in fines.