hi i can see stuff from the perspective of both the community and staff so hey what's up
The reason this rule exists is to prevent people removing evidence of legitimate rule-breakers. The way it works is that you are only banned until the evidence is re-uploaded. On another network I am staff on, we have a similar rule that people thought was dumb until explained. On this network, if you have an inappropriate or offensive skin you are permanently banned. Sounds unreasonable, right? However, once you've changed your skin, you appeal and are unbanned. Those scenarios are pretty much the same; you are permanently banned until you correct the wrong-doing. People are only being presented with half of the situation and judging based on that.
This rule was introduced because of the issues it had caused at the time. People were being bullied and harassed until they deleted evidence. This situation occurred so many times that actions had to be taken to fight back and give those being attacked a defense against it.
And in response to the "hackers get a second chance how ridiculous blah blah" comments: people can change, other people do it for whatever reasons. Hey, I hacked in a few games back in V1 just so I could test what the clients did against other players. I then switched my jar, and started watching out for other players doing those things. That is what actually inspired me to become a staff member. If I got caught and permanently banned back then, I would never have had a chance to become active in this community, I would never have become a moderator, I would never have become a senior mod, I would never have become an admin.