Mohaim

Most proposals for moon colonies are either built underground or covered up with a thick layer of regolith for both of the reasons you mentioned. It’s very likely a collider would also be built underground for the same reasons. Digging a many-miles-long tunnel on the moon with the awful properties of moon regolith to deal with would have its own set of challenges though.

Don’t forget about the heated argument on a bodybuilding forum about how many days are in a week

Install xclip then press "+y (double-quote plus-sign y) to yank to system clipboard then "+p to put from sys clipboard

It’ll be fine until they go public (though maybe a few billion is enough for gaben and they won’t, but I’m not banking on it), then it’ll be an inevitable decline like all the others.