The system allows for it. An effective system makes spam difficult to produce or irrelevant to be seen even when accelerated and amplified by technology.

Yes, don't blame the spammers or the scammers - because it will happen anyway in ways we can't control or predict by individuals with the power to do so. These attacks are the tip of the iceberg and are good baby problems to solve when we are looking to the future in building a permissionless system. 

 Correct. What can be done will be done, that’s why I worried for a moment that they “snuck through” somehow, but it was just invisible tags. 

 @damus also does not do validation of filters yet, so relays can return any notes they want and inject it into your feed, along with inserting fake notes.

NostrDB will fix this.