This is just priceless, I stumbled upon an interesting science website:

We asked a large range of famous celebrities - and people who we think should be celebrities - what they thought the first words on Mars would be. Here’s a selection of the best we received. Where applicable, the category they wrote their words for has been shown.

And guess who was interviewed? Yes, good ol’ RMS:

Richard Stallman
Founder of GNU Project and Free Software Foundation

“Here we can share music!”