Can click ignore, then validate but can still see the person's spam

Likely due to the fact that guests technically have no ignore list. Try if /mute (username) does the same.

nevermind, i read it wrong.

guest can spam? they cant talk can they?

No, they're saying that they can't ignore spammers as guest.

Oh, I thought he meant you can't ignore guests, and I'm like "They can't even talk" then i realized what he meant, so... nevermind.

ohsss.... Umm.... maybe that is intended?

Yes, because there's no ignore list for guests given that they're a guest account. Same for friends.