Given that meta doesn't lend itself to every question having a single correct answer, it seems wrong that you can accept a particular answer.
I may be missing the mark, but you've got three classes of question here on meta:
- Tech support issues for SO/SF ("Where's my rep"/"How can I track my rep"/etc.)
- Feature/enhancement requests ("How about this new badge"/"Can we have comment notifications in the RSS feeds"/etc.)
- Opinion questions ("should easy questions be closed"/"How to deal with unwritten rules"/etc.)
Of those, I only see the tech support issues actually having an answer worth accepting, and seems that it could be exploitable if people started accepting answers, purely because they've of the same opinion for a feature request. Similarly, starting a bounty seems exploitable.