I have no real grasp on coding, but what I was thinking of whas that if there were two letters after eachother that were capitalised, the second one would be decapitalised.
This isn't needed since OPs already have the power to enforce their rules and deal with such ordeals manually, but I like this idea, especially since it doesn't have to apply to all hosts and is an option.
But why not just have a command to control spam in general?
/spamcontrol; <no two consecutive letters can be uppercase> and it would also change the current flood kick system to something with more restricting variables (no same lines of text x times in a row within y seconds)
Example 1
Example 2
Example 3