Theft deterant. What do you use? Options

[surfdogskier]

We just had a car show up here in Pigeon Forge the last couple of weeks. As usual every year, a bunch of cars get stolen. An I mean nice collectables. I would think it would be a no brainer to put some type of theft deterant mechinism on these babies.

What do you guys use on your rides to help make sure your baby is where you parked it when you come out of wherever?

Looking for some ideas and details.

Thanks,
Jason

[StarBear]

1. Never park it in a public space that's out of my sight.
2. Have a marine battery disconnect with a removable knob - I remove the knob and carry it with me.
3. Yes, turn the steering wheel until it locks (tough to flatbed away).
+ Used to have folks remove the tire valve caps (Porsche emblem) and side view mirror (who knows why), but found the kids with the caps (and BIG threat to get parents and police involved) and do #1 above.
I like the idea of the "manual" sticker, but doubt a thief would be driving it away. A little while ago someone's high end car got stolen but thieves couldn't drive it - took enough time that the cops were called and nabbed them!