> lack of respect for boundaries (at mildest hacking is exactly that), willingness to cheat or harm others

One of those doesn't belong on this list. Lack of respect for boundaries in this context is really a lack of respect for authorities, and that is an extremely important thing for a society to have, and has absolutely zero intrinsic connection to willingness to cheat or to harm others, very much to the contrary: Only if you are willing to challenge authorities will you successfully counter authorities harming others.

You can learn how to subvert systems and at the same time how to use that skill to the benefit of society, be it by building systems that aren't so easily subverted where that is appropriate, or by defending people who unjustly are accused of things they didn't do due to unjustified trust in the reliability of an unreliable system.

I really meant and observed lack of respect towards others not just autorities. Reading other people's messages for lols or making cruel jokes on them did not challenged autorite - mostly powerless randoms. There is such a thing as awesome challenging autorities, but throwing temper tamtrum because autority told you not to be jerk to other kids is not that. These types were more likely to frame innocent person they disliked then stand up to defend someone else.

None of that has anything to do with kids toy hack exercises. Which are exactly that and are fine as long as they are fun.

Seems to me its a form of cargo-cult development: its what the ‘great’ hackers did, so we must do it to become a great hacker too.