This individual has #1 performed discourteous conduct....he has copied another individuals work, without the proper engineering he has plagerized.
#2 he may have compromised safety as he may have just "splashed" the appearance and may not have adequately selected the proper materials
#3 he certainly has performed conduct detrimental to the well being of model avaiation.
Items #1 and 3 would go against the person who kitted and sold the model, not the owner. Therefore, it wouldn't affect who could or could not fly at a meet. Who's to decide #2? When was the last time a new kit on the market was put through an engineering review to determine it's safety? How about a proven kit that's new to the field? Who goes through it to be sure all glue joints are secure? It doesn't happen and I can promise there are less than a handful of people who could look inside a fuse and determine the glass layup is adequate for jet flight. With very few exceptions, a safety check is nothing more than someone grabbing the control surfaces and see if they can be pulled off easily.
The only way I can see BV is correct that clones would be banned from jet meets would be if he stated it as a contingency to his sponsoring the meet.
John