Jesse,
I am going to have to disagree with you on this one. Auto salespeople are their own little business within a business. Those who treat it that way are very successful. Most of the people I know do not get paid unless they sell something. If I can teach a guy how to sell 20 cars a month and build a nice book of business, there would be no reason for that person to jump ship. Happy productive salespeople tend to stay put.
Now is everyone going to take the time to manager their own content, probably not, but why would I hurt the guy/gal that might do it and make a better life for himself/herself? Personally I would make it a part of ones daily job expectations. Every customer gets a delivery picture or video and the salesperson would be expected to use that in their testimonials page on their own website. They would also be expected to load stuff like this on their page when responding to Internet leads:
Personal message for Jesse That took me ten minutes to make.
There's so much more we can all be doing, those who settle for just getting by will be nothing more than average.