What sort of "security" devices do you keep on hand in your car?

I do not have a 21" baseball bat in my car.

where do you keep it?

Drive an odd old stickshift car where the hand brake doesn't look like anything else people
 

have encountered before.

I can leave the Alfa pretty much anywhere and it is fine. Even the wheels won't fit on anything else.

For the RS4, it's still available at dealers and that is what insurance is for.

I do not keep it on the floor of the backseats for easy access.
 

I have not had to use it yet, but it has comforted me on more than one occasion.

I leave the price tags on it in case I am questioned about it, but that has not happened yet.

There was this one ficticious time I was at Costco...

It would be pretty hard to get another lava grey RS4

i've perfected the "crazy serial killer" staredown.

You guys don't use the handgun compartment on the front seats? JK

Myself is all i need / and quick track alarm

Yes it would, but another RS4 isn't a problem. I value my Alfas above the RS4, given the rarity.
 

In the end, if somebody really wants a car, they are going to take it - if by flatbed if nothing else.

The South Africans have an under car flamethrower device.

A dented and dirty RS4 with curbed wheels and trashed leather might be the best deterrent;-)