Join, post, spam. We love to comment spam. Whether you just love spamming and want to be part of a group who admits to this [we all do!], whether you want to make an entry saying "hurr hurr commentspammage is gay hurr.", or whether you just want to read spam, we don't mind.
Just join, and post many many spamming comments. You don't have to make sense. You don't have to read your replies. You don't even need to have a mind to do this.