film burns, like vignettes can be cool.  they are only amateur and stupid if they are used in amateur, stupid ways.  both tools can be used well and can really add to your project if you know what you're doing.
on another note, and no hate intended, i'm tired of people hating on film burn with digital footage.  Many filmers strive to replicate a film look through colors and other tools such as 24p, so why not add another element to try to create the illusion?  the problem is when people use film burn on blatantly digital footage, which i know most of us are probably guilty of