I see what you're saying, but I think he still has valid points. It may not just be the empeg, it could be any or all of the rest of the stereo. Heck, we know what some of us do to our cars, the whole darn thing could be stolen. Sure you may still have the empeg, but everything else is gone. Quite frankly, I can replace the empeg from ebay, for a lot sure - but for a lot less than the money and TIME I put into the rest of my installation.
Again, I know what you mean - you should pull the thing out of the car. However, I think his point is still valid - don't show off too much, and don't give out too much personal information. Applies here or anything you do on the internet or in public.