From time to time, a spammer surfaces in the group, typically ranting about how spam control activities, such as blacklisting, amount to censorship and violate that spammer’s right to free speech.
These visiting spammers are referred to as chew toys (because of the slight entertainment value their tirades provide). The same chew toy may frequent the group for several years. There may not always be a chew toy active, and very seldom have there been more than one concurrently.