For (2), the RIAA could act upon data from last.fm without mentioning that they were using the data from last.fm
Examples: RIAA uses last.fm data to find IP addresses of people they suspect of filesharing, and then tries to find other evidence on those IP addresses breaking copyright etc. The filesharer gets busted based on the additional information and the last.fm data never gets mentioned.
Examples: RIAA uses last.fm data to find IP addresses of people they suspect of filesharing, and then tries to find other evidence on those IP addresses breaking copyright etc. The filesharer gets busted based on the additional information and the last.fm data never gets mentioned.