Avoiding doing something because you don't want to get sued and subjected to a lengthy court battle is completely rational and it doesn't mean that doing that t

Avoiding doing something because you don't want to get sued and subjected to a lengthy court battle is completely rational and it doesn't mean that doing that thing is illegal. For example, for decades many TV shows came up with their own lyrics for Happy Birthday song, even though it was well known that the song wasn't copyrighted, because nobody wanted to get sued and fight that battle. Easier to just change a few words in the script.