Even on some of the sites that we are all very familiar with there are statements about limiting use of the patterns provided there for free...I recently found a block I really loved, but it said I couldn't use it for a class. Guess what...I Googled the name of the block, and I found a pattern from the 1930s of that same block with the same name. I used that block for the class, because I took the "public domain" pattern instead of the one posted with limitations. There are ways around these things. You have to find an alternative source of the block pattern that is old enough to be public domain. Not as hard as it appears. Be creative!! Get a sketchbook and colored pencils and start designing your own. It's really not that hard.