I was on a Southwest flight from Denver to San Jose this past Thursday night.  Despite being told that it was a fully booked flight, with no spare seating, a woman sitting in the row ahead of me placed a sign in her two adjoining seats that read:  Suffering from nerve damage - no electronics allowed (this includes cell phones, computers, laptops, iPads, etc).  Newspapers, magazines, and books are welcome.  Everyone kept passing by her seat row.  An attendant, being made aware of the situation by another passenger, approached the woman (who by now had donned a surgical face mask and gloves) and informed her that she - the passenger - could not deny any of these two seats to another passenger, nor could she place restrictions upon them.  Plane filled, 2 people sat next to her and they ACTUALLY HONORED her request.  I respect these strangers for acquiescing to her demands (everyone just wanted to get home and not have an incident like this video), but I fear that it has emboldened her behavior for future flights.  BTW - everyone in front and behind her was using some sort of electronic device before takeoff, after landing, and a few were using devices in flight.  Her 'issue' was unspecified, as 'nerve damage' is a broad diagnosis....perhaps screen brightness, flashing/moving images cause seizures or migraines.  Perhaps she should purchase all 3 seats for future flights?