So when Hoppus posted the image below on Instagram, fans were quick to point out that capitalizing all the letters goes against his lower-case b rule.
Hoppus was quick to respond.
"For all the pendants in the replies," the bassist commented just an hour after the initial post, "The b in blink-182 is lower case if the other letters are lower case and is upper case when ALL of the others are upper case."
So there's the official ruling - when it comes to capitalization, it's all or nothing. Thanks blink-182 (or BLINK-182)!