There’s completely painless ways to die.

…

There’s nothing stopping an ethical death penalty except the ethics of the people implementing

This comment implies that the method of killing is the fundamental ethical problem with the death penalty. The killing part is the fundamental problem for me.

If I supported capital punishment, I’d be in favor of firing squads over lethal injection. It’s more honest. Shooting someone is clearly meant to kill while lethal injection dresses it up like a medical procedure.

I oppose capital punishment though. The criminal justice system is not reliable enough to only punish those truly guilty of the worst crimes, it doesn’t seem to be a more effective deterrent than imprisonment, and it usually ends up costing more than imprisonment for an offender’s natural lifespan.

Yes, it’s possible. Some things might be challenging, like keeping the system up to date without the user having access to an app repository, but it’s possible e.g. by running a script as a cron job.

Whether it’s a good idea is harder to say. Linux distributions for phones are not especially mature and polished compared to desktop Linux. You might get better advice if you explain why you want to do this and who the intended user is.

adb sideload is for installing an OS or OS update. The command to install an app is adb install.

I wasn’t really thinking about cultural differences in my comment. The friend in question is a conventionally attractive woman who lives in the USA.

A friend who gets catcalled often thinks it’s mostly men posturing for other men; they don’t usually do it when they’re alone.

Who do you want privacy from and why?

That’s not a rhetorical question. It matters. If you want privacy from corporations and governments doing mass surveillance because you’re against mass surveillance in principle, Signal is great! As long as you don’t give janky apps permission to read your notifications, or you limit what Signal shows in its notifications, your device won’t leak to those kinds of threat actors. You can’t be sure everyone you talk to is as fastidious though.

If the cops, gangsters, or similar are likely to target you and the people you’re talking to directly, there’s a good chance just using Signal without a security plan won’t keep them from getting the contents of the conversation as in this recent incident where the FBI extracted deleted messages from notification logs. To defend against that specific attack, everyone needs to configure Signal to keep message content and contact details out of the notification. Dedicated devices for secure communication set up by someone who knows what they’re doing are ideal in this situation. Signal is still a good choice here, but Signal alone won’t guarantee privacy.

If you’re being targeted by an intelligence agency from a rich country that has allocated a significant budget to surveil you in particular, you’re probably screwed. There’s plenty of public information about how US government officials and contractors are required to work with classified information to get a sense of how you might try to mount a defense. It’s guaranteed to be inconvenient.

Based on a quick web search, staff can only remove people temporarily for rule violations; it takes a court order to get a long-term ban from the NYC subway.