Well that is not right... ask serverroom... since i use their datacenter and have all my servers with them i am allowed to use it
Yikes, you should definitely be more careful about copying another member's posts since this rule is strictly enforced to help reduce spam but if you do have permission to use it then there should be a disclaimer at the top so people don't report you for plagiarism.
The forum moderators should ASK before they ban.
I honestly don't think the moderators have the time to ask / vet every OP reported for plagiarism on whether they have permission or not to use another member's / company's post. But if your account was wrongly banned then just file an appeal and give the forum admins some time to respond.