In elaborate terms: you have the ability to change any one of the protocols, specifications, designs or standards of the above at their proposal stage or before their mass adoption. You may choose to modify or reject an existing one or create one by yourself.
Some users and I would have common ideas in mind, however I would love to see some esoteric ideas as well.
You’d need to still have a whitelist, so putting the name of your store on the front of the store or telling a friend about a cool new thing you bought is allowed. But yes.
In a similar vein, letting websites render whatever they can imagine has proven ripe for abuse. Basic HTML is a kind of whitelist of it’s own.