Hi [member="Charlotte Homura"]
Interesting post - I am not totally sure of your answer, I don't think it is BANNED, but it's something heavily frowned upon which can lead to the discomfort of others and escalate to the involvement of Staff members to settle disputes, which we always try to avoid.
I found a handy thread here from 2013 about the issue which may help you in your answer:
http://starwarsrp.net/topic/9338-metagaming-its-a-thing-but-not-a-thing-you-know/
If not - I apologise, and I am sure other experienced Staff here will provide a more definite answer!