[DeathArrow]

Well, I am one of the many people who theoretically can hack someone's system while not leaving evidences of it, at least not evidences pointing to myself.

I do have people I dislike, and yet I don't hack in their systems to plant false evidences.

[Stamp01]

If you want to get back at someone, you could just punch them in the face or kick them in the nuts. We live in a world where simple assault results in less serious consequences than hacking.

[iwillbenice]

While I am sure you are competent like most folks on here, I will say this: I have met a good number of people who claim they can "get in and get out un-noticed". In retrospect, I think rarely did they consider the possibilities of observation beyond the actual target system.

My point is this: There is no defense against 0-day/X-day exploits in the wild. But the second best thing against being patched is logging and properly tuned alerting. In my 20-ish years of working in this field I've caught half a dozen attackers/intruders via logs and anomaly alerts. Without those 2nd best things in place the entire network(s) would probably have been compromised.

Cheers.

[lookagain]

Some crimes are trivial to commit. Walking away unscathed from committing the crime is far harder than one might think. Consequences are inevitable, one way or another.