It's quicker to write a stupid enhancement request than it is to write a response declaring why that idea is bad. Project outsiders are not entitled to a well-argued response on why something is going to stay the way it is. They are entitled to nothing unless they are paying for support.

That said, these rants themselves take much more time to prepare than a simple "we're not going to do that, sorry". Theo strikes me as someone who takes joy from hurling insults, rather than simply being busy and therefore curt.