For the dynamic event terminal, it's not actually a tunnel and you don't have to wire it through. You can leave it unwired and it will remember what it registered for.
For the case selector, I don't see what you're seeing. In both 2011 and 2012, the option isn't disabled, but if you select it, the cursor changes to the wiring spool for several seconds and nothing happens. Looks like a bug.
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