Those sort of hard and fast suggested rules might be all very well and good, perhaps, maybe, if we're talking about Long Haul Leisure flights..sort of thing BA do out of Gatwick to the Caribbean, the likes of TUI Virgin do to.e.g. Florida..
Reason? Mainly UK customer base, morning departures ex -Uk, passengers body clocks nicely on UK time and quite possibly well rested due to night before flight spent at an airport hotel. For those passengers, perhaps, a no recline because it's a daytime flight rule won't be a major issue
Those rules would be an absolute none-starter on, say, a morning flight out of Heathrow to say JFK or Washington where probably a hundred plus passengers have connected on overnight flights from other countries even other continents, whose body clocks are half way to the Moon and who really need sleep
If the airlines primarily serving the leisure market want to get authoritarian with regard to recline, so be it, but don't expect it to become universal.