The problem here is because you're expecting people to value quality over quantity in the forum. For the vast majority of signature spammers, they probably just hit the quote button, think up some bullshit from their stream of consciousness which then spills into their fingers, and hit submit.
How many users do you think have the "new post warning" unchecked? I can bet that a large number of the ones who do are the users who are going to have their names on the "last posted" spot in consecutive threads on one of the spam boards.
Undeniably what you say, it's so true, spammers never care about the quality of their posts, all they need is to increase the number of posts. Their posts may be long, but it's pointless How many users do you think have the "new post warning" unchecked? I can bet that a large number of the ones who do are the users who are going to have their names on the "last posted" spot in consecutive threads on one of the spam boards.
About "new post warning", I've used it before, but right now I've dropped it, to be honest, I don't know when I dropped it, but maybe I should turn it back on now, in part, it's good for us
At the very least, we don't need to edit our posts too many times to reply to those above 
This is just a typical example, I see a lot of people go into a certain article and say nonsense that is not related to the problem discussed above, it makes me feel uncomfortable. So recently, I reported more articles and had a fairly high accuracy rate 
