I read the Gospel of Mark a few days ago. In chapter one, there is a story of a man with leprosy whom Jesus healed.
After Jesus healed the man, he asked the man to keep quiet...
Jesus sent him away at once with a strong warning: "See that you don't tell this to anyone. But go, show yourself to the priest and offer the sacrifices that Moses commanded for your cleansing, as a testimony to them." Instead he went out and began to talk freely, spreading the news. As a result, Jesus could no longer enter a town openly but stayed outside in lonely places. Yet the people still came to him from everywhere. (Mark 1:43-45)
Anytime you tell somebody not to do something, they feel compelled to do it. The clearest example can be seen with children. You tell a child to eat his dinner, and he refuses. You tell the same child not to eat his dinner, and he shovels food into his mouth.
Keep this in mind when you write copy. Suggesting that your reader abstain from taking action will produce a corresponding desire in him to act.