No Bulkhead preference?
 

Is it possible to set a profile preference with Delta to not assign bulkhead seats? I hate getting these seats, especially when getting an upgrade at the last minute. Today, I ended up with my baggage stored all the way back in Economy, which is annoying when needing to get my laptop, then put it back during the flight (never mind having to climb over people to collect the baggage at the end of the flight).

I know there are some people who like the bulkhead - can I indicate anywhere my preference not to receive the bulkhead so that others who do like them can receive them?