Get dirt on your opponent, then have a friendly private chat. Can't think Scientology invented this tactic.
Scientology's Puzzling Journey From Tax Rebel to Tax Exempt - New York Times
"*Scientology's lawyers hired private investigators to dig into the private lives of I.R.S. officials and to conduct surveillance operations to uncover potential vulnerabilities, according to interviews and documents. One investigator said he had interviewed tenants in buildings owned by three I.R.S. officials, looking for housing code violations. He also said he had taken documents from an I.R.S. conference and sent them to church officials and created a phony news bureau in Washington to gather information on church critics. The church also financed an organization of I.R.S. whistle-blowers that attacked the agency publicly.
*The decision to negotiate with the church came after Fred T. Goldberg Jr., the Commissioner of the Internal Revenue Service at the time, had an unusual meeting with Mr. Miscavige in 1991. Scientology's own version of what occurred offers a remarkable account of how the church leader walked into I.R.S. headquarters without an appointment and got in to see Mr. Goldberg, the nation's top tax official. Mr. Miscavige offered to call a halt to Scientology's suits against the I.R.S. in exchange for tax exemptions."