What have done towards your prep?

[Prepaday]

Yesterday I was looking for duct tape, the shop didn't have any. I spotted a roll of warning tape and had an idea...I have to bug in, If it came to hordes of people swarming my street looking to break into houses, I could roll said tape out in a square in front of my door, leave a few smelly bags and clothes strewn every where in the hope folk think something nasty has happened and they stay clear?
Does anyone else have any ideas what I could use the tape for? It's black and yellow stripped.
I also thought it would come in handy for sealing plastic sheets to the window if needed.