This is our current FAQ
We welcome cartographers, database administrators, geographers, programmers, and anyone interested in or using GIS professionally.
This might be interpreted in a way that excludes hobbyists and I don't think that was the intention. Questions on the site cover a wide range of experience levels from complete newbie to professional.
I'd therefore suggest to add a short sentence to encourage new and hobbyist GIS users.
professionally
(and leave everything else verbatim), although making explicit is not bad idea either. Do you have an example short sentence encouraging hobbyists? (I can't think of anything that reads nice offhand)