Is it actually possible for a book to be "flagged" like when George took that book into the bathroom in the episode The Bookstore? Just curious.

I wish it were.....

man.... the head (bathroom) is for doing your business.....
the library (den, living room, bedroom, beach, mountains, park bench or nearly anywhere...) is for reading.

'wish they could flag those newspapers some schmucks at the job place take into the crapper zone, then try to bring them back out & set them on a public table or something! Where'd they set that newspaper during personal clean-up time... hhmmnnnn.....???
Once a paper hits the stall it's fish wrap as far as I'm concerned.
"What's THAT doing here?"

re: the orig Q;
possible, not at all probable though.

I've got to see this episode!