The database grows very quickly in size and spammers add on top of that.

You wont be able to easily isolate posts for a relay or community because the clients blast each post to your relays 

 

 Yeap, you’re right, nuking the relay would solve the problem temporarily and put everything at ease, but I think it's enough 

 Communites need their history of content otherwise its just like anything else  

 I understand your point of view