I don't think it's tacky at all. Patterns, at least to the best of my knowledge, are not one time things and then we never knit them again for anyone else. Our changes come in colors of yarn, adjusting stitching here or there, or adding ornamentation like bobbles, type of fringe, etc.
I can honestly say that I've knit dozens of caps this winter and most of them were from the same pattern, yet no two are alike. Think of it that way.