I actually did install the frequency block disable mod. Mine lives in my car as an emergency radio, so I figured might as well have the ability in an emergency (which is allowed) and just stick to frequencies covered by my amateur license normally. Granted the mod isn't really very useful since the radio performs very poorly out of band and sprays out interference, so I should probably just take it back off.

I don't think the FCC cares too much about mods like that on hardware that's meant for licensed amateurs. Amateur license covers all sorts of radio modifications, you're supposed to police yourself and manage what you have the right to do. It's actually using the mod to transmit out of band they would fine you for (theoretically... you're unlikely to get caught), not just having the ability. The thing that they get pissed off about is when people without a license can buy hardware meant for amateurs and easily use it out of band without really needing to do anything. That's what they've cracked down on in the past, especially shady importers on Amazon marketing unlocked amateur radios for bands like FRS.