Wes has it correct.
The whole idea in my post was to AVOID conflict whenever and where ever possible. That is just good business sense.
As to registration. In the past one had to register the work(s) with the Copyright Office prior to initiating a suit. It is a very recent change in the law that eliminates that requirement somewhat. But to not register severely limits your damage claim.
Folks, this isn't like going to small claims court. It is done at the federal court level which gets very expensive and that is why lots of folks rip off
sign companies, print shops, graphic designers and the like as they know the true costs and they count on most folks (victims) not having the resources as well as the time to take that gamble (courts are always a crap-shoot even with the best of cases).