Again, what is intimidating about that? The agency they were dealing with was the FBI, right? And that's the correct agency to deal with this matter, right?
Well in the FBI, 'special agent' simply means any worker who does investigatory work.
If you analyse each element closely it's clear that they're silly. Why do they need earpieces in when visiting Apple? Why must all the cars match? Why must they dress in the same way? Why do they need to bring all those people, what are they all doing?
But the point is, when faced with something new and strange, people often pause and withdraw. This allows you to dominate the situation and prevent dissent.
Large organizations typically procure fleets of vehicles that are all the same model. This reduces development and maintenance costs.
Many institutions, particularly law enforcement, have strict dress regulations and many distribute their own uniforms appropriate to the particular position.