There is a company that has 5 or 6 P-51 Mustangs fitted with smoke generators, and one plane has a punched-tape type transmitter that allows them to write dot-matrix messages. They naturally file flight plans and follow lots of rules.
It’s a well-known outfit, so there would be no reason to worry about them. Apparently they’ll skywrite anything you pay for.
I’ve seen them many times over Manhattan Beach during volleyball championships.
Why would they use P-51's? When it comes to fuel these are really thirsty, and avgas is not in the $2 a gallon range.
I’d pay to have them write biblical messages, such as homosexuality is a sin. Also, liberalism is a mental disorder. How about some insulting messages on the 0s or Hillary?