Don't Like, Don't Read

"Don't Like, Don't Read " is a storied phrase that's become popular with many Internet fandoms, including the South Park fandom, generally employed to suggest readers avoid reading fic that involve pairings or themes that they do not generally enjoy that are inherent to its description. If someone leaves a review on a story, complaining about an aspect of that story which was clearly labeled in the summary (IE decrying the existence of Explicit Content in a smutfic), it's perfectly reasonable to use this phrase in response. 
In fanfiction, if the writer gives their readers warning in the summary of interesting things like the pairings, any slash, rape or mass murdering, they have a fair defense with "Don't Like, Don't Read". If however their summaries consist of such gems as "I suck at summaries", they generally don't have any right to complain and this argument is completely invalid. 
This argument is not always seen as valid. Sometimes the author will say this in response to criticism in order to avoid even the most polite form of criticism, even when it's perfectly correct. Some people argue that the phrase is logically fallacious — how can you know you won't like a fanfiction if you don't read it, after all? A reader cannot "unread" something once they have read it (though you'd want to, sometimes). Would they prefer that you complain about a fanfiction, or more generally, a show you don't even watch? If you asked the person for their opinion, then this argument is invalid.
Category:Terminology