Signature rules
Read them. There's nothing there that says anything about "taking up a page", and using a scrollbar, spoiler tag, or any other way to get around the sig size limit is against the rules. It doesn't matter if your sig is in a scrollbar or a spoiler tag, it still must be within the limit.
So why does Chaos190 get away with it? And that is kinda stupid, I mean, if it is not that big, unless you SCROLL DOWN, then it should be fine. Whatever, I changed it.