I frankly hate scanners. They suck. Oh, they may have features and a high gadget factor but their quality and durability and audio performance is mostly firmly in the "toy" category. I have a very reasonable expectation that I can drop an XTS5000 or an APX or my XL185 multiple times and expect it to suffer no damage but a few scuffs. Something I'd never expect out of a scanner.
As long as it's possible to do so, my "scanner" will be a Motorola or Harris radio programmed to the NAS methodology using every practice possible that will make it a glorified scanner, receiving only and never transmitting a single signal on any system that I am not an authorized user of.
However, I have the knowledge required to do this safely and stealthily. If it's a requirement to do so, I'll go so far as to disable the transmitter via component removal to be absolutely SURE.
I do not recommend that those who have a lesser knowledge level should follow my path. In fact even if you know more about the subject than I do, I still don't recommend it.
I see it as my right to listen, my choice to use a radio instead of a scanner, and my obligation to do so in a manner that never betrays its presence to even the most paranoid and observant system manager.
Here and now, it's easier to accomplish those goals with a Harris radio than a Motorola. For a genuinely REASONABLE price I can simply purchase the required software with full access keys for unrestricted programming. It's not cheap, but the radio will cost me more than the software and access keys. And Harris radios include true receive only functionality built right into the software, something Motorola seems to be opposed to offering and always has been.