The only way people could add more BC to the supply is if the MARKET accepted a close BC copy and pegged this new currency to have the same worth as BC. But how likely do you think the market would accept such a proposition?
Why should somebody reject another version of Bitcoin, let's call it "Bytecoin", if he accepts Bitcoin? Where's the difference?
What is the reason, in your opinion, that the market rejects Bytecoin but accepts Bitcoin when they're just one and the same thing?