Most OOC observers I have seen were dressed Gorean, were already Gorean Rpers and wanted just to watch quietly some RP scenes without being involved into them. Just that. They were not a visual breaking immersion as they were dressed Gorean, they were not people new to Gor with Earthen clothes, they didnt disturb.
It is difficult to observe simply a scene from a few meters without taking the risk to be addressed IC. Too, I know, that for many people, it can be disturbing/confusing to have people who are not OOC, but IC, who watch simply the scene and who dont emote.
When you are looking for a sim where playing your character, you want just to observe the RP, you dont have always a backstory explaining your presence in city A some day, in city B another day, in city C 3 days after. Just good sense.
Observers who take the time to watch the RP scenes played in a sim, for days, who have this patience are usually serious people. They will often adjust their backstory to the sim, they took also the time to read carefully the rules, they are motivated.
Too, when you play a woman, you are more comfortable. No need to RP your NPC escort, to be accompanied. A woman, IC, in a city which is not her homestone, doesnt make sense. A slave without owner, a slave visiting a city for her owner, same. If I visit IC a city which is not my homestone, without playing a NPC escort, yes, I wont whine because a man will try to collar me when he will understand that I am a foreigner.
If you want to visit IC a sim, write a plausible backstory explaining your presence and respect the sim theme (visiting the Tahari dressed like a Torvaldslander in winter, pretending that you traveled alone in the desert, without having accompanied a caravan or being guided by a native Taharian guide, is an immature and stupid role play). Too, if you RP a FW, NPC an escort if no man with you, if you RP a slave, NPC a owner. It's not a big deal. And if you are just looking for a sim where setting up your home, you should be allowed to be an observer, to respect the OOC rules, to be dressed Gorean, to be discreet (cam into buildings, do not enter inside) and to do not interfere in RP.