"Books-A-Million Puts A Slip Of Paper Under The Stickers On Their Books To Prevent Sticker Residue Being Left On The Covers"
ha ha good catch
Apparently you don't know what a "knock" is and how that can interrupt meetings as well.
In my house it was simple:
Door closed = don't bother
Door open/partly open = available
in germanya we a use those things called fork.
instruction to get them all out: read bottom of jar
really stupid thing, just another plastic trash that we can do perfectly fine without