UGH!

Okay, so I guess I don't understand why some Christians have to try to convert everyone in the world to their religion.
Yes, I'll tell you right now... I keep track of people via Facebook. I can't help it when someone posts something and it ends up in my news feed. So when someone is posting something to the effect of: PRAY! I left a bible in [a restaurant]. Let's hope that whoever finds it will be saved!... I say:
MY GOODNESS! As if they couldn't hassle people enough by walking up to someone and trying to convert them. They think they can minimize effort and maximize "revenue" by leaving Bibles around! Can't they just leave these good people alone? I also had a 3-year-old hand me a flyer about getting saved and whatnot. That is absolutely the most disgusting thing I have known someone to do in a religious context. Forcing CHILDREN, who aren't old enough to understand religion, let alone much else about the world, to act as their puppets to do their bidding. It's just so CRUEL and I can't even come up with enough words to describe how upset it makes me feel.
Granted, I do know Christians who allow freedom for choice in their religion. I applaud these people. I also know religions, not just Christians, who wait until people are old enough to form their own choice as to what they want to accept them into their religion formally.
Why can't people just accept that there are many religions out there and that some people really hate it when you try to convert them...
As an American I should have the freedom of religion, or freedom to lack one. So why isn't it against the law for these people to be trying to force others into their religion. I say force because, as far as I see it, this type of manipulation (like using children, for example) is being just as forceful as if they threatened us.
I wish they would leave me and those like me alone...