"The power of LinkedIn is in the trust it establishes."

I feel the complete opposite way. I've had people claim I know PHP on my profile when I've never used PHP in my life. That's endorse stuff is major baloney. How can you trust that when anybody can just click Endorse for whatever they want?

Very true. I have endorsements in C++ from my auto insurance guy, which doesn't make any sense either.

> I know for software engineers, Github could be a better filter

For some engineers. There are many, many excellent developers who don't spend much time on Github. John Carmack doesn't even have an account, for example...

Validate the resume? What does that mean?

a lot of companies won't even look at you unless your resume/work history is on linkedin.

I've never seen this done. I'd love examples for companies. Social media often augments folks, but I've never seen someone rejected for not having a LinkedIn.

That's as silly as companies that only look at your Github.

I.e., I'm sure someone out there does it, but they are dumb.

A company I worked for started outsourcing a lot of its work to a certain Asian country last year. One of the issues we had when trying to recruit people is that they will just blatantly lie about their experience on their CV. Asking for a GitHub profile was an easy way to backup their claims, with minimal time wasted on my side - at least until they cotton on and start putting fake projects there.

(Admitidely trying to outsource work just to save money was dumb, but it wasn't my decision, so I had to make do)

Which companies are those? I've never had a problem getting jobs and interviews without a linkedin account.