Yes you can make a new account.
Yes if I see it, I'll mark it with negative trust. I don't always out alts of people with negative trust, for instance if all someone did was ask for a loan w/o collateral, or bought/sold an account, or something else that didn't cause any actual demonstrable harm to someone (or a serious attempt to do so) then I don't.
I can't just ignore it, it wouldn't be right to deprive people of that information without a good reason. Though I don't generally have time to actively search it out. You do what you got to do, I'll do what I got to do.
I'm Just offering my services to people
If you really don't want me here then i will not be here after clearing all my pending trades.
The issue is not that you are not wanted here, the issue is that people should be warned you attempted to do damage with your former account. What you did was receive negative feedback on your account that may or may not have been accurate (I think it was accurate based on the evidence available both at the time and as of now), then you threatened to steal money that you were claiming to be trusted with if such negative feedback was not removed. To top that off, you also were making vague threats to puzzel.me aka cryptoforcause via PM that some may consider to be extortion.
The negative ratings against you was given (and will likely be given in the future) in order to serve as a warning to others that you probably should not be trusted with other people's money and that people should exercise additional caution when trading with you because of your prior history.
I can say that you are not unwelcome here. If you were truly not welcome here then your account(s) would be banned. You are free to post what you want provided that you follow the rules of the forum. The easiest way to sum up if you are welcome to continue participating is, as long as you don't post large amounts of incoherent trash and as long as you don't spam your advertisements then you are welcome here.
You are also welcome to trade here if that is what you wish to do. There is a large amount of commerce that takes place on the forum and there is a lot of money to be made on the forum honestly, if you want to try to make some of that money honestly then you are free to do so. However with that being said, based on your prior history, people should be warned to exercise caution when dealing with you. If, over time, you develop a reputation of trading honestly and your services (and/or goods) are in good demand, then maybe your potential trading partners will disregard such warnings in the future, or maybe it will be approbate for such warnings to be removed in the future (although this is unlikely).
I can say that your efforts to call out potential scammers is appreciated by the community. At the very least, doing this will earn you some karma points. Over time your ability to detect and call out scammers will improve. I don't think however that this is sufficient to make up for your history.