You should never use too much flash ... even when taking pictures of movie stars.
The pesky "red eye" effect that often occurs in flash photography can be easily fixed these days with Photoshop and other nifty image editing programs, but just because we've got the digital tools and the digital talent doesn't mean the phenomenon doesn't happen any less often.
Believe it or not, it's Hollywood's one-sheet photographers that have it the worst as they're often tasked with selling various films with close-ups of various stars' faces. Below you'll find "Before and After" comparisons of some of the most jarring examples of movie poster "red eye." Sheesh, can you believe that one of K.Stew in the "Twilight" poster? (Wait a minute ...)