There's been a lot of statements about the efficacy of parts of PRISM, just not about the metadata collection. Obviously not the end-all-be-all but the PCLOB re

There's been a lot of statements about the efficacy of parts of PRISM, just not about the metadata collection. Obviously not the end-all-be-all but the PCLOB reports about 215 and 702 are worth skimming. 215: https://documents.pclob.gov/prod/Documents/OversightReport/ec542143-1079-424a-84b3-acc354698560/215-Report_on_the_Telephone_Records_Program.pdf https://documents.pclob.gov/prod/Documents/OversightReport/e... 702: https://documents.pclob.gov/prod/Documents/OversightReport/823399ae-92ea-447a-ab60-0da28b555437/702-Report-2.pdf https://documents.pclob.gov/prod/Documents/OversightReport/8...