People believe so many dumb things about copyright, trademark, patents, and trade secrets. For example: You don't legally need to use the various symbols for trademarks and copyrights you don't own. Unless there's a contract in force saying you have to, there's no Symbol Police gonna rappel from the skylights and break your keyboard if you say you used a Xerox without the nifty ™ symbol.
Another thing I've seen is the apparent notion that you can "renew" a copyright. Nope, not for a long time now: You get the full term up front with no special action, and once it's done it's gone, unless the law is actually changed in the meantime. Disney didn't "renew" the copyright on "Steamboat Willie" and the dumb live-action remakes aren't being done to "renew" anything, they're just some executive having a brain fart.
