It's true that any wall around you that protects you from something unavoidably comes with a gate that someone else guards, unless you want to guard your gate p

It's true that any wall around you that protects you from something unavoidably comes with a gate that someone else guards, unless you want to guard your gate personally (and that entails filtering out armies of spambots, worst case manually). As with any power and control you delegate to any entity, only time and good behavior will earn them your trust. That's theoretically what companies are competing for, your loyalty.