This is an interesting subject, but I think there is a lot of over-reaction going on here.
I don't think you have anything to worry about if you're just making and selling a few items, as long as you stay away from Disney and a few other biggies like the NFL and other professional and college sports team stuff.
And as a matter of fact, the most that could happen is that, if someone wanted to push small vendors, they'd be seeking a cease and desist order on you, not having you arrested. Violating a copyright is a civil matter, not a criminal matter. Only when you are involved in product piracy, like counterfeiting an identical licensed product, does it become a criminal matter.
Thank you for the note of sanity, Don. I've spoken with some fabric retailers, both very large and very small, and they have all said the same thing. One major retailer even added that, given the speed that new fabrics move through the market these days, by the time you get a cease and desist order, the fabric won't be available any longer anyway.