This is for self-defense. Not that I live in a country where they (officially) ship, but just in case…
Regarding “how to tell them apart from regular glasses”, this question is mainly about Ray-Ban Blayzer Optics:
Ray-Ban Scriber Optics:
And Ray-Ban Display:
Because these are by far the hardest to identify. Other glasses either have a clearly visible “RayBan” text in the top left corner (which for the pictured ones isn’t clearly visible) or can be identified just by their style.
Tbf, if enough people are shot for filming people with their “smart” glasses they’ll stop wearing them.
Not that I condone it, just making an observation