There are a handful of countries where posting isn't permitted from because of prolific spammers.

I won't post the list of blocked countries, sorry - really a case of "security by obscurity". While we use more than one method to identify spammers (Cloudflare, Project Honeypot, StopForumSpam, country blocking) we don't want to give the list so people get ideas...

One become trusted basically by meeting with one of the mods - be it in business, or in a Geekzone Pizza, etc... We also give Trusted status to those that represent their companies in our forums (obviously not the spammers).