Here's a list of garbage movies that you'll most likely want to stay away from. I may not be able to get these hours of my life back, but hopefully you'll never have to waste them.
The Killers
The Last Exorcism
The Rite
Repo Men (plus any other movie that stars Forrest Whittaker)
The Mechanic
These are of course movies that aren't obviously garbage. They were movies that probably were on your "rental" list, so there's a higher chance you would've watched them. I hope you're all able to tell which movies are obviously garbage, like the entire Twilight series.
Please please please add to the list... it will save lives.