Spam out of control

[H.]

Hey all,

I got email digests of this group for a while, to get news about RSH,
but dropped out when the spam started outnumbering posts... I’ve been
checking in every couple months, and the group’s been totally
overwhelmed by it. There’s no real info left!

What do you say to making this a moderated group, or shutting it down
entirely until a new release? I know I’m not going to keep coming
back, even once a month, if it’s nothing but spam.