When I've interviewed candidates, it only comes up if they volunteer the information. I don't go searching for their usernames on github based on what I find by stalking them elsewhere.
So it's the candidate wanting to show their work. If they came to the interview and I had no idea what was on their github profile, they'd be justified in thinking we either weren't interested or had taken on too many candidates to allocate time for.
Like others have said, though, unless they have a pinned project which is evidently awful, nothing I see there is going to put me off, even if they only have a bunch of empty hello-world projects.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.