Basic Trope: A search (usually misguided) for hidden enemies of the community.
Straight: The cattle around Dinkytown have been getting sick. Parson Bob believes this to be the work of witches hexing the cows, and urges the townsfolk to find out who the witches are. Since witches don't really exist, innocent people are accused, and some are even executed after torture makes them falsely confess.
Exaggerated: Eagleland's economy is tanking, so President Bob, desperate to draw blame away from his own policies, declares that it happened because of hidden witches who "hate Eagleland" and are no doubt in the pay of a certain foreign government. He orders a nationwide crackdown on witches, with broad new powers granted to government agencies to carry out seek and destroy missions. A media blitz warns that "anyone" could be a witch, though those who refuse to swear loyalty to President Bob and his party are singled out as likely witches. Children are encouraged to report "unusual" behavior in their parents and neighbors.
Downplayed: Someone's been stealing lunches out of the Tropeco break room's refrigerator. Manager Bob goes around the office accusing people with suspicious crumbs near their desks of being the culprit.
Witches and magic do exist, but they arn't what people think. The magic they use if different from the accused power that is making everybodies' life worse. They might even use magic that counters the problem.
Inverted: A group of hidden witches secretly hunt and kill members of the Dinkytown community.
Subverted: It turns out there really are witches, and they really did hex the cattle.
Double Subverted: ...but only to protect the cattle from Parson Bob, who is a werewolf who wanted to get rid of the one group of people who could stop him.
Parodied: The people of Dinkytown haul various people accused of being witches before the magistrate, somehow not noticing that the magistrate is an old woman in a black dress and pointy hat with a wart on her nose, who calls for order by pounding her broomstick on the ground and swears by Hecate.
Zig Zagged: Parson Bob blames supposed witches for the cattle sickness, but there are real witches, but Parson Bob was just siccing the community on them for his own advancement, but the people of Dinkytown just add werewolves to the list of people they're hunting....
Averted: The people of Dinkytown don't blame their problems on hidden enemies, instead seeking out rational explanations.
Enforced: The government passes laws requiring communities to search for witches on a regular basis.
Lampshaded: "Aren't we getting a bit carried away? How do we know for sure if witches even exist?" "Are you doubting Parson Bob, Goodwife Alice? That sounds like something a witch would say!"
Invoked: This trope is usually invoked by the person who starts the witch hunt.
Goodwife Alice, once the witch hunt is in full swing, accuses her elderly aunt of witchcraft in hopes of getting the old lady executed and inheriting her land.
Defied: "Are we all idiots? There's a perfectly rational explanation for these events, and we don't have to come up with some wacky conspiracy theory about hidden witches to figure it out! Now everyone calm down, and let's approach this thing logically."
Discussed: "We'll probably want to skip the sky-clad ritual down in Dinkytown this solstice. Parson Bob got the locals all riled up about 'witches' and we don't want to get caught up in that hunt."
Conversed: "This movie set during the Colonial period is really pushing the notion that our ancestors were superstitious idiots. Now they're having that preacher claim that witches are responsible for the cattle sickness, I bet you they'll have a Burn the Witch! scene soon."
Deconstructed: The Witch Hunt trope itself is a deconstruction of mob mentality and the desire to scapegoat unpopular members of the community for its problems.
Reconstructed: A reconstructed Witch Hunt would be a hunt for real witches, with witches as dangerous demon-worshippers and trials that fairly determine whether or not a person is a witch. Vigilance, not paranoia.
Played For Laughs: The Chew Toy is accused of being a witch.