Somehow they are running commands to spawn this gear or something.

I once went to the military base with friends and we found what we thought was a place where hackers were generating hacked gear. There were like 4 kitted out M4's a few mosins with several long ranges scopes, and the M4 magazines had ammo amounts written in hexidecimal which I could clearly see converted to some number over 1,000,000 rounds. We did not touch any of it for fear of being identified as hackers. When we ran back to electro there was a crew of 4 dudes rapidly teleporting around and firing mosins machine gun style and some had M4s that sounded like they were shooting 100 rounds per mouse click.

I have also had a few instanced where I am wounded, but not killed, by a hacker. Each time this happens I run very far away to the inland and find a safe place to log off. Every time I take a single bullet from a hacker i always spawn in a new server as a fresh spawn even though I bandaged, got fully 'healthy' status, and logged out 10km away from the hackers arena of death.

I will also add the jails on military bases. Some refer to these as "camo buildings".

When I first experienced this I thought that it was perhaps because I was not wearing shoes, however, this is not the case.

On further thought though it would be very cool if the shoes warn impacted the loudness of your steps (ie: Boots - Loud/clunky Sneakers - medium effects Barefoot - minimal sounds and can cause bleeding after running X hundred/thousand meters).

I agree! Alternatively, a feature that keeps the player at the wait screen and prevents logging in when active players are within 'X' meters of their spawn in location.

Even with the server hop timeout, the lack of log-in noise encourages ghosting around the map to spawn in behind other players.

A vast majority of my dayz deaths are due to hackers and server hoppers ghosting in from behind. In my 300+ hours of playing I have only been legitimately killed by a player probably 4 times.