Possible Clues:

• Boycott, e.g.
• In favour of nuclear experiment — or against it?
• Object is to get a tiresome person to admit corruption
• Demonstration in support of trial
• Complaint from bore about pants
• Demo at expert game in 9, say
• Demonstration, maybe by students, not against examination
• Complain, seeing rubbish in old Hungarian city
• Harry Potter's complaint
• Take exception