I can change my tweak back to the old header profile links, but that will return to the My Activity tab as the default.
Everyone: We can't remove the Activity Stream and we can't revert to an older version of the software. It seems as though the vB developers put their efforts into creating the feature for this round; maybe next round they will add in a way to turn it off. If not, then as I said, I am looking at a plug-in that might add that control to your profile.
Till then, we can only recommend that you ignore it. The off-switch has not been built yet.