I understand from here and here that assets are defined by the unique combination of their asset_code and their asset_issuer.
Suppose I am asset_issuer=Steven and I want to issue asset_code=SteveCoins, redeemable only for high fives from Steven. It looks like I can issue them here, but what keeps someone else from also issuing SteveCoins of their own? What if they are not Steve? Being able to issue their own issuer-specific source of dollars makes sense because your dollars are as good as Steve’s, but are your SteveCoins as good? It seems like no.
Is there a network-supported-way to maintain a monopoly of your issuance and prevent knockoffs? Or from the other side, what prevents non-Stevens from issuing dollars, bitcoins, coconuts, or SteveCoins they aren’t authorized to issue (for whatever reason: they are not Steve or they don’t have dollars, etc.)? And what policies are in place by the network to punish that?