As I'm sure you're all aware theft of the RNS-E units from our cars is becoming rife. Audi seem to have little interest in this as the unit will be phased out when the new A3 arrives.
If anybody has heard of any theft prevention measures for the unit then I think it'd be a good idea to share them with others.
I personally feel that having the metal case of your unit engraved with "Stolen from [car reg]" would make the units harder to sell of on ebay etc and if enough owners did this then the units may become less attractive to criminals. However, this would rely on the majority of units being marked and ASN members make up only a tiny proportion of 8P owners. I emailed Audi to suggest they contact owners of RNS-E equipped cars to offer an engraving service in view of how common these thefts have become but I am yet to receive a reply (don't worry, I'm not holding my breath...).
If you have any genuinely useful bright ideas then please share them. Lets try not to have a list of crazy ideas please, believe me - I've toyed with the prospect of 1/2lb of semtex wired to a pressure release switch behind the head unit but it's becoming less easy to get hold of that stuff nowadays.