Microwave isn't used for DTT distribution, it's either fibre (and two diverse routes) for main stations, or UHF rebroadcast for the smaller (1000 or so) relays. In fact microwave isn't used very much at all. Take a look at the BT Tower and all of its siblings.
Dodgy RF connections are very unlikely, and the effects of sonic boom on a 1000ft steel mast are no worse than gusts of wind, or thunder. High power UHF transmitter masts did have UV detectors, to shut off the power if there was a nearby lightning flash. Not sure they do these days.