I tend not to download stuff that is flat-out non-commercial. Don't get me wrong, I very, very much appreciate the people who load up freebies and they have the right to do what they want... but I've never been sure where my comic falls in the "commercial or non-commercial" spectrum (I do make money off the ads I guess? Though not enough to pay for even the hosting, so far :P ) and if I ever do a print edition, well -- the idea of tracking down everyone whose work I've used even in a single panel and offering them a cut of whatever tiny profit I make -- it's the right thing to do, but I'm terribly lazy. :)

I can certainly see why anyone would hate seeing their stuff grabbed and put into merchant packages, et cetera, and as I said it's your stuff and you have the right to restrict me however I want. But I am eternally grateful to those folks who put in a clause saying "commercial renders okay," and I try and make sure I give each and every one of them credit.