Show and Tell

I was looking around at work today and I noticed that half the people at work were using things that I showed others. I had showed people at work how to pull up a web site that lets you monitor the amount of calls coming in, and I also showed them how to send messages to each other (both of which were not supposed to be accessed). They aren't big things, but I haven't had anyone show me something they decided to find out at work. I'm constantly copied. I don't know if that's a good thing, or if I just need to stop sharing things with people and let them figure it out for themselves. It's a show and tell, I show and they tell.