Ovinomancer
No flips for you!
I'm sad to read that, because the reason I'm interested in the discussion is because I want to understand the reasons for your position. I've pretty much come to the conclusion that there are no reasons beyond simple preference, but my mind is still open.
For instance:
that's a reason! If you can identify the context difference between OAs and invisibility that leads to your different conclusions, I would be happy.
Try the large explanatory section on melee attacks that define it more clearly, paired with common understanding of the words that aren't looking for a perverse outcome, and you can see it.
For invisibility, it doesn't make any narrative sense to have it break if I throw a rock at you but not if an ancient dragon breaths fire on you. Insisting on sticking to rules regardless of outcome is something I stopped caring about awhile back. I'll gladly discuss how the rules are written (I've done this with Arial a few times, being on both sides of him in those discussions) because I'm interested in rule design and the incentives they create, but when it comes to 'you have to follow this rule regardless of the stupid it causes in game' I'm out.