It's for content that you don't want to see. The reason is your business. I think you're confusing the etiquette rule that downvotes are not for opinions you disagree with, because we want people to be able to discuss different viewpoints without the hivemind casting them into the ether.
If there's content you don't like it is perfectly valid to downvote.
The joke is that Kali is specifically a penetration testing tool, so it comes with tools that would let you pull off tricks like changing prices in ordering interfaces that aren't protected from that kind of attack.
this really happened. (discuss.tchncs.de)
Downvotes (lemmy.world)
rule (sopuli.xyz)