My favorite was some (probaby Microsoft) boxed software I got in the 90s. The top of the box had a big warning that by opening the box you agreed to the terms of service that were IN the box.
Normal human beings had to tore the sticker in order to get the CD-ROM and install Windows, so they automatically 'agreed' to the TOS.
Until it was found out you can actually open a jewel case at the other side by carefully disonnecting the little plastic lids on the other side, thus never damaging the sticker.