Stupidity.
Sexism.
Racism.
Homophobia.
Nationalism.
Conservatives.
Blind Faith.
Lies.
Legislation based in fantasy that restricts personal freedoms.
Cockroaches.
The Prequels.
The Official N-"OT" DVDs.
Parsley.
Coriander.
Reality TV.
People who talk in the cinema/theatre during the screening/performance.
Drunken Witless Hecklers.
That 'Wet Dog' smell.
'President' George W. Bush.