Meaningless? With songs as good as those, do they need to have a meaning? Aside from Eat Starch Mom, those are the best on LJS, and alone make they make the whole album worth it, although I love the whole album.
But as for a lot of those songs that people say are meaningless, I do find a lot of meaning in some of them. I'm not sure about Hey Fredrick, but I do find lot's of meaning through Two Heads, It'd probably take several long paragraphs to say how it makes total sense to me, but it does. For Aerie, I'm not sure what the "without a rifle on your shelf" line means exactly, but the rest of it sounds as if she had watched some eagles, or some birds, and felt creative. There could be some deep meaning, but it might just be her writing a song about birds, it all fits, and it's a cool song about them. But that final line does make it seem that it's about something else.
I see your point for Twilight Double Leader, about a call to the new generation to take action, but some of it also sounds like Paul talking about Grace. I think it's songs like those that only make sense to the writer, I've written a few that made no sense to anyone but me, it's about being in that time and place, and in that person's head. It's a psyche thing, I think. But when it comes to lyrics, I usually just think that the writer had something in mind, but it has no absolute meaning to everyone, and anyone can take it however they like.
Hide, Witch, Hide!
The Good Folks come to Burn Thee
Their Keen Enjoyment hid Behind
The Gothic Mask of Duty!