To the extent that employers want to screen candidates who skip out on jury duty, it's hard to argue that there's a "privacy" issue in outing them. Skipping jury duty should be a matter of public record. You are obligated to serve as a juror when required. Willfully avoiding a jury summons is in fact a misdemeanor crime.
Don't skip jury duty.
The bigger problem with posting wanted signs on social networks is that they can't be expunged. This is a real issue, but very few people ever expunge their arrest records anyways.
The even bigger problem has nothing at all to do with social networks; it's that it's unfair (and probably unlawful) to screen employees by arrest record to begin with.
That is, at it's core, my point. What happens if the case is thrown out? Even if removed from Social Network X, your fugitive status will live forever in the Wayback machine, on scraping sites, and so on.
Don't skip jury duty.
The bigger problem with posting wanted signs on social networks is that they can't be expunged. This is a real issue, but very few people ever expunge their arrest records anyways.
The even bigger problem has nothing at all to do with social networks; it's that it's unfair (and probably unlawful) to screen employees by arrest record to begin with.