I'm not against this in principle but if memory serves (I wrote the current version), we're within a couple of characters of the message limit. You'd need to dig out space for it out of the existing message.
If it comes to it, we could dump the Apple section (I think that's the least used portion) and insert your suggestion as:
This is not about Ubuntu as defined by our scope. [...]
But it's getting a little crowded. As FEichinger points out, this is really something that all OT reasons should get automagically.