hmm don't know what is all spam but as example spam is if someone posts in a thread only to increase the post count and is not really interested in the topic or just to know other people see the name often enough to get known in a forum or that people don't forget him/her
spam is what this "girl" is regularly posting on all of our walls with email and so on 
spam is when someone is posting in a thread but never reacts if you quote him and ask him something. zanewanes posts as example are often spam for me. if you quote him and ask him something you will get only an answer if you are lucky.
spam is when you open a thread which isn't informative and you are not interested in what people say in that thread. as example you can open a thread like "veggies, explain why don't you eat meat?" i think you would get some replies and discussions in that thread but you should really be interested in that and not only opening the thread to get vgchartz points and in reality you don't even care what their answers will be...but you can open a thread you are not interested in if it is really informative like "playstation 4 revealed". i think this wouldn't be spam even if you wouldn't care.







