I never said or even suggested that crop circles couldn't be manmade. Can't speak for anyone else. The accomplishments you mention above weren't done by a handful of people working without support in secret. That's what seems unlikely.
What amazes me is how provoked so many people seem to be by the mere asking of logical questions. Some (not you) seem to want to shut down any critical inquiry from the get go. That's a superstitious mindset in my POV.
All I'm saying is that, just because something SEEMS unlikely, doesn't mean that it IS. It is a common thing in our modern world to assume that individuals, without some "help", cannot accomplish great things, or flights of fancy. However, there is abundant evidence to the contrary.
I've no fault with your asking honest questions of logic. That's why I provided the answers. You seem willing to accept them.
What drives me nuts is when others see the same evidence and discount it, mostly because of the false "researchers" and other Art Bell types, and their own wish to believe the myths over the truth.
Hey, at some point, we all had to give up believing in Santa Clause.
I think that what annoys some (and I'm guilty of it sometimes myself) is that some people use faulty logic. They want so much to BELIEVE in paranormal things, like some "alien" origin for the circles, or some strange Government conspiracy, that they blow right by Occam's Razor.
The actual simplest explanation is, and always has been, that they are made by humans with ingenuity and cleverness. For some, however, that is simply TOO simple, and not nearly as romantic.