Finally on an EB-1 (yay!) but haven't left the country in years because of my anxiety crossing borders. I've heard stories of green card holders getting turned around at the border for admitting to smoking weed etc - have you heard whispers of anything like this recently? I get the difference between federal law & state law; is this the kind of thing that USCIS would have access to dispensary records for, or are they just trying to get people to incriminate themselves? I'm planning on traveling over the holidays and I'm still convinced that I won't be allowed back in.
Also, are there precautions we should take with cell phones & border security these days?
Not a lawyer, Never heard of that, sounds borderline ridiculous. Most likely it happened, but you're most likely to die on the plane back. It's all in your head. Go and have fun.
You can do something perfectly legal in a given country, but then get denied entry to the USA because it's illegal there.
It's like driving your car at 150mp/h on the Autobahn in Germany, but then being denied entry to the USA because driving at that speed on public roads is illegal in the USA.
Also, are there precautions we should take with cell phones & border security these days?