There is a great difference between spam and zoning, but most people do not know the difference. Cast a heap of range attacks dose not mean you are instantly spamming. The thing is that zoning is a legit tactic and also a very powerful one, I think many of the people that complain about spamming are in fact just zoning and looking for something to blame.
What makes zoning so scary in MK9 is that the chip dmg in this game is crazy high. So once you are behind it is hard to come back, meaning that some good zoning can leave u in such a deficit, even if you block successfully. I think this more than anything is what makes people cry spamming, as zoning is so powerful in this game, many players are simply not good enough to be able to recover from it.
For example.... if you are facing Jonny Cage and you are playing Noob... Is casting a heap of ranged attacks to keep Jonny away form you spammign or a legic tactic... it is of course a legit tactic... but people call it spamign as they do not really know what they are talkign about and are looking for a way to belittle the person that just beat then as a way to make themseves feel better.
Here is a good example of zoning.. but most people online would call this spamming
http://www.youtube.com/watch?v=E09bCBddubo&feature=player_embedded#t=141s
http://youtu.be/5AuL5T2nMYo
exactly.