Why should a person maintain their LinkedIn profile, if they're not actively looking? Wouldn't it make more sense to only update it when they decide to actually look for a job, and not waste time/energy/spam-dealing-with before then?
As a person working in the IT industry for more than a decade, being intimately involved with several major Open Source projects in demand, it sounds debatable (perhaps even wrong), as many in demand skills last longer than fads (eg PostgreSQL clueful-ness).
So, what you're saying doesn't sound right to me. :(
Thoughts? :)