If you could arm a security bollard

[Khriss]

Basically anything that will catch fire - sawdust is used in bank safes cos if you disc cutter it or oxy-torch it - It catchs fire and fills area with smoke , K

[bankhouse builder]

Use a mini acetalene  bottle or a couple or three of the plumbers map gas that would sort them

 

[Gary Prentice]

So to prevent theft, you arm a bollard in front of the vehicle that explodes/ignites and damages/destroys the vehicle

 

That would make an interesting insurance claim!

[Rough Hewn]

The best anti theft idea we came up with is:
A very high powered tweeter from a sound system in a steel mesh box installed high up.
With a remote on/off and a light/movement sensor.
Would wake everyone in a mile radius and deafen any intruder.

[tree-fancier123]

3 hours ago, Rough Hewn said:

The best anti theft idea we came up with is:
A very high powered tweeter from a sound system in a steel mesh box installed high up.
With a remote on/off and a light/movement sensor.
Would wake everyone in a mile radius and deafen any intruder.

or phone jammer and night sights, then dangle some bait

[Gary Prentice]

Anyone tried claymores? 

[Watercourse management]

After my defender got nicked of my drive I hooked an alarm gun which uses 12g blanks to the front my new truck which I thought was a great idea,but the amount of times I forgot to unhook it first thing in the morning,not good for the neighbors.

[kevinjohnsonmbe]

http://bagnallandkirkwood.co.uk/product/12g-shotgun-blank-firing-alarm-mine-tripwire

 

Brilliant, useful as an alarm but also lots of fun around the yard!

[chuck norris]

Nitroglycerine

 

Pros:

Can be made with kids chemistry set 

cheap

1 kg could level a building

 

Cons:

very unstable (direct sunlight can ignite)

100% ilegal

 

How to make:

1-Cool 13 mL of nitric acid using the ice created by the

refrigerator.

2-After it has cooled, add to 39mL sulfuric acid (99% h2so4),

mixing very slowly.

4-Cool the new mixture to 10-15°C, which we can measure with

the thermometer already “invented.”

5-Slowly add enough glycerin to cover the entire surface of

the acid.

6-Keep the solution below 30°C.

7-Stir gently for ten minutes, then the nitroglycerin will

form as a layer on top of the acid solution, while the

sulfuric acid will absorb the excess water.

8-Filter out the nitroglycerin and place it in sodium

bicarbonate, which will neutralize much of the acid remaining.

This will help to stabilize it.

10-Now slowly and carefully remove the nitroglycerin from the

bicarbonate.

Edited March 23, 2018 by chuck norris

[Rough Hewn]

Chuck,
there are many better chemicals for this idea.
Nitroglycerin is stupendously unstable.
Also the technique you describe has some very unpleasant side effects.
Also under current anti terrorist legislation, you're looking at serious time in prison.
It is a tempting thought though...
Anyone on here ex army?
Are thunder flashes legal to own?
[emoji848]