Generally speaking, classifying a house as "McMansion" feels like a form of gatekeeping. If the person who lives there enjoys it, who are we to judge?
Shit on your own porch all you want.
Not sure how (or why) you've gone from "we shouldn't be judging other people's taste" to "I get to defecate wherever I want."
For some reason, you keep trying to shift the discussion to vandalizing someone else's property, which you don't own.
In that case, no, property ownership is generally not a subject of taste. Do you really think it is, asdff?
That's life when you're HOA-free, though. Sought that out. They can do what they want with their property, more power to them. Maybe they like it, maybe it's water smart, maybe they just don't feel like weeding. At least they're nice people :)