In fact some people who want to work on trains put in strong complaints if their reserved seat has been doubled booked or if the seat reservation has failed meaning they don't get a proper table and they say things like they can't work at a flip down table and they've lost two hours worth of working time.
"Diddums" is the first word that springs to mind.
I wish the designs of seat-back tables were better as much as the next person - one only has to look at some continental trains to see the difference between them and the pathetic little flap you get on most UK stock. "Strong complaints", though? I was under the impression that the primary objective of train travel is transport from one place to another place; the provision of space to double as a mobile office surely must come secondary. And if it's that important, these people should pay the extra and travel in first class, where tables are pretty much always provided.
Yes it's nice to have space to put your laptop, papers etc, but you wouldn't expect it on a bus, coach or aeroplane so why should you have a divine right to it on a train?
(Of course, complaining about double-booking of seats and knackered seat reservation systems I completely understand.)