Alright well since you took the opportunity to register on the forums and plead your case (something I actually respect, since most people just whine about being banned without using any real cognitive thought), I'll give some significant leeway in this instance.
I had another admin check out the demo, and it pretty much consisted of what is over use of the saysounds donator feature.
We don't really have a written rule for this, as it's something that I've unfortunately neglected to add to the rules list for some time.
I do, however, want to point out a specific statement and respond to it.
1:There is a something called mute. Instead of trying to be the hero that tells me to shut up you can just tell everyone to mute as well. I think you just did it so people can like you
Muting players who spam saysounds doesn't do anything useful, as the sounds would still be played.
In general I want you to consider this a warning, and I ask that you please refrain from playing the sounds excessively as they can be annoying to other players.
For everyone else, if the saysounds are annoying, please remember that you can disable the ability to hear them with the !sounds command on the server.