Interesting question and investigation, not one I expected from the youngest Weasley, "to a degree, yes. The biggest thing you have to understand is the situation you are in. There are ways to appear polite, but not stare at someone's eyes. Looking at their nose, for example, will make it appear that you are looking at their eyes. Unless you are sure you can block out anyone who would peer into your mind, then try not to stare into someone’s eyes. Of course among friends, family, and trusted ones, you can stare into their eyes all you want."