Please give the location on the planet (do this via places section) you are talking about so people can go help investigate and give you a bit better information about a possible resolution.
It is not against game policy unless people take it very far in how they act.
It was only a matter of time before some people would attempt to impersonate other people, especially at a guild level.
As mentioned already in this thread do not confuse this guild with the illuminoorti that @Havok40k, myself, and others founded. We do not have a member using the name you mention and don’t usually condone actions like that.
We also wouldn’t intentionally take over a settlement and instead if we were to go into a location would work with the nearest Mayor about some type of agreement.
If you give the location and planet again I don’t have a problem checking it out.
This group might have done it intentionally because it seems pretty obvious that they took an already established guild name and adjusted it. Either way, the illuminoorti are behind this thread in an attempt to solve problems like this.