Not bbcodes are cached, but the entire post (as I wrote in the post above). Hiding things would have to be done at runtime, like the existing hide hacks do. This is not something this framework provides, you would have to do that yourself.
Edit: Thinking about it - you could clear the post from postcache at runtime using something like this:
PHP Code:
delete from postparsed where postid=x
One would have to test if this could be of use in the environment my addon creates, or whether a seperate plugin could be created that deletes a post from postcache when a certain custom bbcode is present, or a plugin that keeps a post from being entered into postcache in the firstplace if a certain custom bbcode is present.