Responding to 999/112 calls from the GenPub is one thing, over reaction from some TWATCO because you've decided to return due to a minor inconvenience (such as the vac pump has failed on a PPL Skill Test, so it wouldn't be fair on the applicant to carry on) is something else....
Don't try to fly my aeroplane - stick to your radios. I'll tell you what I need.
And, may I add, that if I'd been Duty Aircrew Officer and some ATCO had decided to put the fire crew on readiness because he thought the weather wasn't very nice in his totally unqualified opinion, then he'd have been out of the seat sharpish and I'd have had someone else running local.