But if you're (hypothetically) selfish/stupid enough to try on such a stunt, my suggestions for how the crew responds would make you think twice. Especially if warned that such overly disruptive behaviour could also lead to criminal charges and/or an emergency diversion for medical or security reasons....
Well that is exactly it. I don't try things like that because I know what airlines are like and that I sit in the seat I pay money for.
Same goes for everything in life most of the time. If you want to sit in business class, work hard, earn money and pay for it.
If you don't then buy an economy ticket and that's the deal.
I don't earn a lot of money, but I buy business class tickets because to me it makes my little time off that much more enjoyable when I go on vacation. I certainly don't expect free upgrades, free food and drinks when flying in economy and I accept that as part of the economy ticket I purchased.