That's what happens when sharing a plane with other people, who are all different.
The best thing to do is suck it up for a few hours and then move on with your life.
For those who really can't fly with people who recline/ put up their feet/ snore/ shout/ smell/ use upper class toilet or bring their kinds who do all the above, the solution is simple - buy or lease your own plane and create your own utopia onboard
While this type of behaviour is uncouth, my main concern is a 60 yo wearing sneakers. As for the leg stretching, there may be a medical reason.
As a regular economy flyer in an aisle seat, I've noticed the disturbing trend of people putting a bare foot over the armrest of the aisle seat in front.
I'd be completely grossed out having that next to my elbow as I'm grossed out enough having it in my eye line.
Everyone realises that your hands are probably "dirtier" than your feet, socks or shoes in terms of microbes, right? Not mention the sheer number of potential pathogens in your mouth and throat?
This is crazy! I can't believe how fearful some people are of "germs" and what they might do to you. It explains why so many of my patients try to pinpoint when they got their cold, and from whom.
You get colds, you get gastros. You are more likely to get them from the faeco-oral and airborne vectors than from anything on someone's socks, especially when you involve a secondary surface such as the bulkhead.
I've been in row 1 a few times before and often used the bulkhead and by be-socked feet to prop myself up. This probably isn't an issue for the shorter people but I didn't realise it was such a point of contention!
You are more likely to get them from the faeco-oral and airborne vectors than from anything on someone's socks, especially when you involve a secondary surface such as the bulkhead.
As malodorous as her socks may have been, we're concerned by the women putting her shoes on the magazine holder (read the OP), likely initiating that very faeco-oral (shoe-hand-mouth) vector.
Regarding secondary surfaces, from people who know about microbiology (too?):
Bacteria Can Linger on Airplane Surfaces for Days
"MRSA lasted longest (168 hours) on material from the seat-back pocket while E. coli O157:H7 survived longest (96 hours) on the material from the armrest."