Comment by shingoshoji

most equipment doesn't use trunked protocols like DMR, because it's vastly more expensive, and more difficult to use that honest-to-goodness analogue radio.

Plus, the hypothetical we're discussing here is that some non-ham asshole left a spurious transmitter running. Do you think that a trunked magically protects people from interference? No.

Finally, yes, encryption is illegal to use on ham radio.