Nice try, but not good enough...

There still no practical reason, in your example. Each tag could be replaced with a "*", No need to "a,b,c" options. The only reason I see to have them in the script would be for multiple choice trivia.
So IF someone had a script with multiple choice, that also specifically used [b ] rather than any other format of choice (such as "b)", "b:", "b>", "b]") then they would have a problem posting their script...
Or give us the ability to use those bold and color tags so we can easily point out in ANY script were problems are... Maybe make "[b ] to [bold]"??? When would that appear in an miRC script?
