"Disarm" is just as serious as it sounds, with the subject being the physical abuse Billy endured as a child. I guess I can understand its popularity but I've never been a big fan. Actually, it was the first Pumpkins song I heard via the MTV video when it was released and I remember thinking "*This* is that Smashing Pumpkins group everyone's talking about?". But then I saw the "Today" video and decided to buy the album.
I've always preferred this electric version of "Disarm" from "Earphoria"/"Vieuphoria":
Am with you on "Silver####" btw. That'd be the first "Siamese Dream" track I'd get rid of and the fact that it's the longest makes it even worse.