I have had a Slender Man longer than you have been on EMC and I have had this signature since early November. As for alt, an alt is an alternate account someone has. I was making a joke that you were nfell2009's alt, because you said that you like making spam threads for fun. It is a common joke that nfell2009 likes to spam.
Your threads are a bunch of spam recently. They have no meaning whatsoever. Don't take this as offense, just informing you you can get banned/get your posts deleted, if it is deemed necessary, by the mods.