I would actually take Garlona's post a step further, and say that if you're not expecting to be found out while playing a villainous role, then You're Doing It Wrong.
The job of a good villain isn't to be good at their job. It's to be an entertaining and challenging foil for the heroes of the world. If a character is so skilled at fighting and hiding that any attempt to find them or fight with them is doomed to failure, then nothing interesting is going to happen with your character. I'm assuming, based on your original post, that you're playing a villain because you want them to come into conflict with people. The important thing, therefore, is coming up with openings that can be used for that conflict to happen. If they're diplomatically immune, or indistinguishable when in disguise, or whatever else, then there's no opening. You might as well be playing any other character, or at the very least, describe them as something other than a "villain."
Yes, there are people that are better at conflict than others (building up tension, waiting for discovery, asking how / where they can find information, etcetera), but if that's going to happen in any capacity, expect word to eventually get out, and for people to be after you. That's what happens.
That's part of the reason why a lot of people find Secret Villains ultimately unrewarding; they're one-trick ponies. As soon as someone finds out that you belong to the evil empire that's out to destroy them and everyone they love, then they're going to tell their friends, and that'll be it.
As an aside, it's also worth noting that such divination as you mention is a featured part of the game, in the form of memory-sharing with the Echo. You can always exclude people that use it from your roleplay, but be advised that it might be something people try to do, considering that it is a part of the lore. They might not do it to everyone, but in the case where doing so might lead to interesting conflict, i.e. finding out someone is a Garlean, it's likely that they may do it in that circumstance.
The job of a good villain isn't to be good at their job. It's to be an entertaining and challenging foil for the heroes of the world. If a character is so skilled at fighting and hiding that any attempt to find them or fight with them is doomed to failure, then nothing interesting is going to happen with your character. I'm assuming, based on your original post, that you're playing a villain because you want them to come into conflict with people. The important thing, therefore, is coming up with openings that can be used for that conflict to happen. If they're diplomatically immune, or indistinguishable when in disguise, or whatever else, then there's no opening. You might as well be playing any other character, or at the very least, describe them as something other than a "villain."
Yes, there are people that are better at conflict than others (building up tension, waiting for discovery, asking how / where they can find information, etcetera), but if that's going to happen in any capacity, expect word to eventually get out, and for people to be after you. That's what happens.
That's part of the reason why a lot of people find Secret Villains ultimately unrewarding; they're one-trick ponies. As soon as someone finds out that you belong to the evil empire that's out to destroy them and everyone they love, then they're going to tell their friends, and that'll be it.
As an aside, it's also worth noting that such divination as you mention is a featured part of the game, in the form of memory-sharing with the Echo. You can always exclude people that use it from your roleplay, but be advised that it might be something people try to do, considering that it is a part of the lore. They might not do it to everyone, but in the case where doing so might lead to interesting conflict, i.e. finding out someone is a Garlean, it's likely that they may do it in that circumstance.
