MATZ's are a military thing, civil aircraft do not require permission to cross/enter them!!!
Certainly don't but surely it doesn't do any harm just to give them a quick shout if you're going to penetrate the MATZ rather than go above it? Apart from anything else you might find out about the 100 ton behemoth that is on radar final and going to pass half a mile in front of you.
Coincidentally we're having a GA safety day fly in tomorrow at the mil base I fly from. 46 a/c expected and 100+ people. Good to see that people are interested in flying safely.