An Indiana man contends he was engaging in satire when he announced on Facebook that he and co-conspirators were going to use assassination and arson to “purge the vile pig scum from this land and restore constitutional rights to the people.”The 7th U.S. Circuit Court of Appeals isn’t laughing.The court last week upheld Samuel L. Bradbury’s conviction on a federal charge of maliciously conveying false information.The court rejected the argument that faulty instructions allowed jurors to convict …