Unbinding Shift + #, $, etc... From Joining Global Chats

I apologize if this is explained somewhere, but the keywords make it tough to narrow down a search for this...

Is there a way to unbind having shift + number keys (special characters) from joining various global chats? I am 100% uninterested from ever seeing these chats, and I often enough accidentally hit shift + one of those keys when I'm typing to a friend, and then I end up typing half a sentence in the global chat... it's not pretty.

Very, very annoying 'feature'... any way to disable these binds entirely?

Thanks in advance!