What the Fallacy?!
Genetic
The Fallacy
Judging something good or bad on the basis of where it comes from, or from whom it comes.
Why it's wrong
This fallacy avoids the argument by shifting focus onto something's or someone's origins. It's similar to an ad hominem fallacy in that it leverages existing negative perceptions to make someone's argument look bad, without actually presenting a case for why the argument itself lacks merit.
Example
Lisa refused to believe the news report about the storm because it was published by the channel that cancelled her favorite TV show.