Hey @broken-akay. After yesterdays discussion I decided to look up as well.
We all start at a reputation of 25 and the idea is to build it up and not go backwards. If you have a low reputation your comments and posts could be hidden. Accounts that spam or plagiarize will be very low on reputation and maybe in the negatives.
There are some exceptions though as one user recently had a fight or altercation with a whale and got flagged into negative reputation. He is actually a good account and is more the exception to the rule on reputation.
Thanks for asking the original question as I have learnt something now lol.