I have been contacted even recently as a knife maker to copy this or that knife. I have personal issues with that. I tell them so. I won't do it if it is an exact copy, no way. As for myself, I may make something that looks a little bit like someone else's but I never show it or sell it. Very few designs are actually new. I also note the maker that inspired it. Owning up to a mistake immediately shows integrity and trying to hide it is a big mistake that cannot be easily be overcome and takes a long long time. Too bad.