I have no idea why you need to worry about those stuffs when it's really easy to prevent it.
Negative trust: This mostly because they're scam and cheating in the same campaign.
Ban: Mostly because plagiarism, shitposter have very low chance for being banned.
This mean, if you're create a post and include all the original sources, also didn't have intention to become bad people, you're 100% fine.
As long as your intention is pure and won't do anything bad that could harm the forum and make your own account be at stake, then you are free from tagging with negative trust and banning. Although there are some light mistakes in the forum that are somehow unavoidable, like posting with low content particularly for newbies, or sometimes off-topic, but as you grow and mature in the market, these mistakes will also be corrected and you get to improve your performance in the forum and become a potential one.