With Apple, you have to pay for AppleCare if you want any tech support ANYWAY, so most people (who don't pay for applecare) aren't getting "tech support" from Apple even though they have "real" Macs.
There's nothing in Adobe's EULAs that restrict w
hat sort of machine you can run their OS X version on, so your claim about not having any support for ANY software is patently false. 3rd party software developers will support their software on non-Apple branded Macs.
EULAs are relatively meaningless unless they outline conditions specified in actual laws, for example if the EULA says that a product is a single-user license, then legally it can only be used by one person at a time. Also, according to the DMCA (which I don't think will be around much longer), circumventing copy protection is considered the same as copyright infringement and is treated as such, with intent to distribute in some cases. As OS X has no copy protection, running it on non-Apple hardware doesn't fall under this law either.
And as for updates breaking the OS, that is true, but then if OS X is so great, why does it need updates? Do you feel like OS 10.4.10 isn't stable enough to use as is indefinitely? I mean, just turn off software update or ignore it or whatever. Wow. That was a tough fix. I bet nobody running OS X on a PC will think of THAT. Haxorz r stumpd. Aplz winz.