Rules are one thing. Everyday work is another one.
Yes, that is why we are asking for evidence. Could cost somebody his license, should he violate FAA regulations during his everyday work. He can cause accidents that way, you know.
Also please note that eating and drinking count as physiological needs - yes, you are allowed to
leave duty station and eat. But please pay attention to the fact that not both pilots are off duty (and not both pilots are eating the same meal today).
Putting your tablet on switches is a minor risk, because of the switch guards. On the Space Shuttle, you can even step on the panels without risking much because of them (but usually, you have a protection anyway).
But to quote on of the teachings for professional software developers: How do you want to write tidy code, if you can't even keep your workplace tidy?
And don't mention Russian pilots - those guys turn off engines inflight for flying steeper approaches.
It might sound offensive, and while this place here is not an aviation forum anyway, but there is a huge difference between being forum/internet-theorist (or "defender of the truth"
) quoting rules and posting papers and graphics all day long (or calculating how much turns/degrees it needs to change an altitude setting on the FCU via the corresponding knob on an Airbus) or being practically involved in the corresponding real life business day-to-day.
It is extremely impolite to hinder people who want to leave. So please, go to your FSX VA amateur pilot forum, where everyday work involves sitting on a chair in front of your virtual flight deck without wearing your seatbelt while crossing the pacific in real-time.
Otherwise... please let us assume, for the sake of having a reliable reference, that all real pilots follow the FAA/EASA rules and otherwise commit errors.