We(moderators) cannot be everywhere at once. If you see somthing you don't like or someone breaking rules, then report the post. When you do that, it sends an email to all mods, and one of us will take care of it.
As for giving warnings for useless situations, we as mods try to follow the rules and guidlines that are set forth here:
Trust me we could definatly give out more warnings if we were to follow the rules to a "T". I for one have no problem with being a Nazi Mod. I can see in your sig JawS that you are breaking one of the rules.