Except it's not always easy to see if you're actually harmed or not. In the toner case, the UPS sticker is also a (very gentle) nudge away from trying to refill the cartridge yourself using a cheaper service.

As for the personal information, there is an entertaining talk[1] by Pinboard's Maciej Cegłowski about how we can't even know if collected personal information will at some point come back to hurt you or not.

[1] http://idlewords.com/talks/haunted_by_data.htm