Seriously, though, I’ve been in the hobby since ‘77, and because of being an Army Brat & going off to school, etc., I’ve played RPGs in 3 states in 5 different metropolitan areas with I don’t recall how many different groups.
Each group’s etiquette depended on a bunch of variables: age of the participants, venue hosting the gaming, and just the general passing of time.
I’ve been fortunate in that I’ve only encountered one person with abhorrent hygiene practices- including nose picking at the table- and only one person whose politics were so radically different from mine that it could have been a serious issue had it not been for an almost Highlander-esque treatment of the host’s home as a neutral site.*
As for “passing of time”? It’s not a dealbreaker for me if electronic devices are not allowed at the table, but it would require me to make some adjustments. I’ve been storing all of my PCs, NPCs and Campaign Notes, etc. on PDAs, phones or tablets for something like 20 years now. Almost nothing exists in physical form. And even though I probably have 85% of the books for the systems I play the most, I maintain bookmarks for SRDs and other play aids- very handy for finding things on the fly or helping those who don’t have the books.
Bonus: it’s a lot easier to pass notes to the GM via text than a folded piece of paper.
* In retrospect, it’s still disturbing and disappointing they kept welcoming that guy into the game night