I'm not really sure about the best course of action to spread the news about this, but this will be a start at least.
I've never trusted the MPAA rated system because I wasn't ever certain of what I was getting myself into when I went to see a movie. If anyone has seen
Sixteen Candles, I'm sure that you can sympathize.
Then, one magical day, a friend of mine introduced me to
kidsinmind.com and my movie watching experiences changed all for the better. I was no longer unsure about what I was about to watch. Kids in Mind has a 0-10 scale for profanity, violence, and sexual content, so you can decide what level you are comfortable with and (if you have them) what you want your kids to watch.
If you had checked the site before seeing
Marley and Me (PG), you would have seen these scores:
and then perhaps you would have realized that this is not just a cute dog movie and left the six- year-old at home.
The only downside is that kidsinmind started in 1992, so you won't be able to look up old films. Sorry.