

Just wait until your average beat cop is given Federal powers to “assist”, regular citizens are deputized with Federal powers, or military units are tasked with rounding up people en masse.
Those are very likely going to happen. Logistically, it is the only way he can round up everyone he wants. There are 14 million undocumented immigrants in this country. If he were to evenly split how many are detained and deported, that is 3.5 million annually, or, just under 9,560 people a day. ICE isn’t staffed for that, having only 20,000 employees (general employee number count, many of those may not be ‘field officers’). Even including Customs Border Patrol and their 58,000 employees (most of which can’t be tasked with field missions because they need to work the borders themselves), empowering standard law enforcement and Federalizing the military is the only option to logistically complete Trump’s task.
And, when rounding up nearly 10,000 people a day, there are absolutely going to be innocent US citizens kidnapped as a result. And if Trump’s goal is to not just detain but deport that number of people as well, that means that there are likely going to be law-abiding US citizens who are kidnapped and flown into a foreign prison without any due process. There may be US citizens already caught in the process of this; sadly, we don’t know. The US government may determine that it would just be easier for them to just be “disappeared” rather than bring them back to the US and spill the story to the media. US families will just one day find that their husband, wife, son, or daughter didn’t come home from school or work, or was taken in the middle of the night, and vanished with no confirmation or acceptance of responsibility from the government.
Agreed; having a network already established is going to be needed.
You can further obfuscate your location by only powering up to communicate at predetermined times, and never on a schedule that can easily be guessed. Thankfully, what further helps out is that many ‘smart meters’ being used by utilities uses the 915Mhz band; meaning, there’s going to be a lot of activity on it, so just someone selecting the 915Mhz band and following that to message sources is going to lead to a lot of dead ends.