Hmmmm... don't want to start a ruckus, but it is exactly the same attitude as 'a black man mugged me once, so therefore all black men must be potential muggers'. And if you said that, then you'd be rightly pilloried. Just because a few merchants do something against the rules, doesn't mean you should tar all merchants with the same brush. Or spoil the activities of the majority for the actions of the minority. If a post is against the rules, why not just move it or delete it, rather than issue blanket bans? Punish the individuals who commit the 'crime' rather than take away the freedom of the majority...