Since user stats have been disabled, it's good to see selective scraping.
An average of characters/post would be good. Same thing with posts/day. If we target users with typical spammer statistics, we can gather a list of them.
I've been reporting tons of spammers however a high number of the most egregious one-liner burst-posting spam megathread posters have slipped through my fingers.
How about "average time between posts"?