Specifically, cyclists can:
1. Issue "citizen citations" with official-ish tickets.
2. Label offending vehicles with an "I was a jerk to a cyclist" sticker.
3. Introduce the risk of paint damage with a Jolly Rancher.
4. Create certain coating cremation via DOT3 brake fluid.
5. Make cars stink worse than their exhaust with a carefully-placed stink bomb.
6. Throw a trusty bolt to dent offending traffic as it passes.
7. Lock out loony drivers by filling their keyholes with super glue.
8. Cut through tire valve stems with a utility blade.
It goes without saying that you shouldn't do anything you're not fully prepared to take responsibility for. This project is meant to increase cyclist confidence, not fatalities.
You can order one made by me for $20, or build a cooler version yourself for ~$10.
Step 1: Set Your Design Goals
My main goals with the BDK were:
1. Cost: <$10 in parts and very little time to build so I can happily sell tem at $20 each.
2. Size/weight: small/light enough that people might actually carry it.
3. Subtlety: objects close enough to everyday detritus as to permit "plausible deniability."
4. Variety: different severities of revenge will help me ride more confidently and encourage fair responses by cyclists. U-locks should sometimes meet windows, but these occasions ought to be few and far between.
Next, I kinda just brainstormed and experimented until I was happy with how close I got to ghese goals. Here's a much better overview of the design process than I can provide.
Step 2: Get Your Ingredients
Paper for parking tickets: I used a thicker orange stock, to make it look all nice and official-ish
Sticker material: these were laser-printer-compatible rectangular stickers, ~3"x5"
Contact lens case, preferably with thin plastic so you can cut it in half
Brake fluid, DOT3
Stink bomb materials:
Valerian root capsules: 100 for like $9 at Walgreen's
Syringe (to make it easy for moving brake fluid and stink bomb juice)
Bolt, slightly shorter than length of altoids tin and nice and heavy.
I think I used 4"x3/8"
Super glue: generic at Walgreen's is way cheap
Jolly rancher. The car won't care what flavor:)
Utility blade. Something like 10 cents each when you get a case of 100 at Home Depot
Altoids tin case. Use one after eating the altoids, or buy a little metal case of your choosing.
Step 3: Prepare Stink Bombs
Step 4: Fill Stink Bomb and Brake Fluid Chambers
Step 5: Create Citations
Click on the pictures for images of the front, back, and 3-per-page layouts (pdf).