To start off, I'd like to recommend a movie called "The Invention of Lying". It's a brilliant movie that gives u a glimpse of a world without lies. This is not to promote the act of lying, but rather, to acknowledge its importance, purpose n dangers. Now, what are the worst lies one can think of? Some say they're the ones that are meant to harm- obvious. Some believe they're the ones that were done to protect- a bit hypocritical when lies are never meant for such a function, n most likely than not, it'll surface some day. Maybe not now, not later, but some day, because in order to complete a lie, another will have to be fabricated, n so on. There's bound to be a loophole somewhere because nothing's perfect. "It's just the way the cookie crumbles!" For me, the worst lies are the ones u tell urself.
Keep in mind, lies are not only of the spoken. They could be actions, inactions n feelings- intangible things. It's funny because, due to my past experiences that I'm not so proud of, I can see through lies in similar matters even before they've been completely formulated in the person's mind. Like a flat screen, their thought processes scream out at me, n as much as they try to explain or reason with their words, I laugh knowing it's not the truth. Oh, how they try so hard to convince themselves- it's a little painful to see someone do such a thing. It tempts me to just spill everything on the table n put their HEAD right into the facts- everything that's happened n how they reflect certain denials- so they'd wake up n smell the reality. Let's be honest here- by the time I'm about to choke u for all this frustration, the elephant will probably have grown to fill the room right up to the corners. It'll need more than just a blanket to "disappear" for a while. For one, Harry would never agree to lend his invisibility cloak to u for ur elephant, or else, by the time he gets it back, it'll better fit someone of Hagrid's size.
So, what is the best solution? From my experience anyway, u leave them be. Let them dwell in their own realities until the dome caves in. Not to be cruel, but that's how they'll learn. If u've ever tried to talk some sense into these people, u'll know how many years it sheds of ur life. I mean, when I was on that side of the fence, I understand everything but nothing anyone said could shake my world. I could sit there n listen for hours, nod in agreement, but spend the rest of the night ironing out all the kinks to everyone else' "point of view". Stubborn-much. One thing I do have to say though, outsiders do tend to have a better judgement of the whole situation as they're not personally effected in any way- well, other than being totally annoyed that they can't knock some sense into u. Having been there n done that, it's best to just stay out of it unless u have a grand enough plan to shove the elephant out of the room- that'll be fun! Personal advice, if u can, even if ever so slightly, feel an alternative truth, then maybe what u hold to be true all this time, isn't the one.
The most destructive lies are the ones you tell yourself.