excluding spam + noise such ad / content can be blocked at client end filters or hide - hence user will not see them unless they dig for it leave it on themselves 

typical mentality of  mod or moron kicking out who they dnot like or their views as they do in x reddit telegram discord etc is SPECIFICALLY NOT BUILD in here. 

one reason nostr is not suitable DM or groupchat
BUT very suitable OPEN PUBLIC microblog liek this