[skynode]

Don't know what the HN abbreviation, IANAL, means but in my ignorance it just looks quite distasteful. :\

[grkvlt]

It isn't really specific to HN, It's been in use since the days of Usenet, as I recall.

[Normal_gaussian]

I am not a Lawyer.

I first saw it on Reddit, I presume that isn't its starting point though.