I am allowed to mention Mixers unless their name is their website and I am allowed to discuss about them freely. Right?
You're allowed to say "foomixer". You're not allowed to direct people to "
https://foomixer.com". Probably just as you're allowed to say "Pirate bay", but prohibited from linking to their dark web URL.
Disclaimer that I'm not a mod, but this is what I understand from my jurisdiction.
As far as I understood theymos' current ruleset about mixers, you're allowed to say foobarmixer but not foobarmixer.io when the website of this mixer is actually
https://foobarmixer.io. Apparently you're not allowed to direct users to this mixers by providing a working link with bbcode tags [url]https://foobarmixer.io[/url] or [url=https://foobarmixer.io]whatever describes foobarmixer[/url], nor you're allowed to promote or advertise foobarmixer in any way obvious.
Deliberate attempts to avoid or bypass the forum's wordfilters for mixers will get you banned.
This is mostly what BlackHatCoiner said, just a bit more specific to make it less ambigous.
My interpretation here in this post is not complete as I omitted the rules relating to personal text, signature space, personal website link, ...
I wanted to clarify what BlackHatCoiner said and ease PrivacyG's concerns. I'm not stressed by the mixer rules, I'm not happy either. Can't always have the cherry on the cake, have to move on.
What could be promotion? As general talking about mixers is still allowed, I wouldn't interpret highlighting the importance of mixing coins to make analysis of their exact history unfeasible or simply for own privacy reasons as promotion.
Rules that allow an interpretation wiggle room are problematic as everybody likely has its personal interpretation of it. It's not easy to find rules with little to no interpretation wiggle room and I only hope that mods and admins act fair with the ban hammer.