So I like going around the servers claiming I'm selling magic diamonds that look like dirt blocks for 500r.Though its a joke could I still possibly get banned for this?
Well If anyone actually bought it from you than yes you would probably get banned but I believe if you don't sell them to anyone at all it could pass as a "joke" .
It might be frowned upon. I'd say it's best to not do this. We have actual scammers that do things like: "Free diamonds at my res" and then when everyone shows up claim: "Oh I just ran out" or the more bold: "Haha got you idiots." It's just to close to fitting in with that crowed...though I know you aren't doing it for that reason.