Nielsen Issues Threat?
Nielsen sent a very strong warning to clients saying they would be violating the "permissible use" terms of their contract, if they disclose any of the 'impact' data it began releasing. 'Impact' data is supposedly part of Nielsen's aggressive ratings sample expansion plan.
Nielsen has been charging a ridiculous amount of money to stations for data that has been tabulated, in basically the same way, since 1950.
The diary people didn't say what the penalty would be if you get caught sharing the info.