What everybody misses here is that we are doing the same thing my father did. He licensed and litigated and protected his property, and we have to follow the same tradition, because the way the law reads, if you don't protect it, you lose it.
So, like a forgotten fire, a childhood can always flare up again within us.
There are plenty of recommendations on how to get out of trouble cheaply and fast. Most of them come down to this: Deny your responsibility.