I am very well aware when someone is trying to actively figure me out (rather than just get to know me and figure me out passively) and it makes me uncomfortable. When this happens I put a wall up that appears natural and will keep it up until I decide to let them in. Basically I give them a more shallow version of me. ENFJs and ESFJs seem to do this the most. They also tend to make declarative statements about me when they think they have me figured out. Other types are more subtle about it.