The OP is alarmed at the use of common privacy enhancing techniques (of which wearing a ski mask is one) which allows a prosecutor to 'enhance' the charges against someone to increase the threat level. They are also alarmed that non-technical people cannot see that changing your MAC address is just "easy" for a technical person to do as holding one hand over the other as you type in your PIN at the grocery store, and equally innocuous. Nobody disputes that 'changing your MAC address' should not be considered as evidence of intent when prosecuting a crime, but there is a lot of dispute as to whether that action in and of itself rises to the level a crime in its own right. This is what the OP fears will happen, and there is some evidence to support that.
That takes us to your second paragraph which talks about how painful it is for you when others express their emotions with respect to the events of the past weekend (and to be clear other events like it). Generally, yes, HN is a community of technologists and technology enthusiasts who discuss the merits or lack thereof of various technology trends, events, and personalities. That said, it is also a community of people. People can often discuss dispassionately about topics that are at arms length, but the weekend case struck close to home for noticeable fraction of the hundreds of thousands of people who visit this community. They need time to process these events, and one way they process them is that they talk about them.
My point is that it helps to appreciate that others may be more affected by recent events than you were and this is their way of processing their emotions. No need to whine about it, you can take a break from HN for a week or so until it winds down. When things are continued beyond their reasonable lifetime they tend to get moderated down. Patience.