2 years ago when I first learned about it, I tried to tell my friends about it, but they just laughed at me and doubted it. Their loss >. But having someone IRL to talk to that is just as enthusiastic as you could be very helpful in keeping you motivated. Especially, if you are good friends with them, you could talk about it a lot and put together some competitions like first to do something in a LD wins. Unfortunately, I have no friends IRL who talk about it even though sometimes I mention it, so the forum is a great alternative as well. I wouldn't say that it's harmful to talk about it off the internet though.