I work in a big insurance corp, Facebook not banned there, but twitter and friendfeed were blocked after they appeared on tv or made the news by getting bought

I work in a big insurance corp, Facebook not banned there, but twitter and friendfeed were blocked after they appeared on tv or made the news by getting bought for millions. Blocking remains arbitrary and ineffective as about 2/3rds have iphones or similar. RSS remains the way round all the muscle flexing of IT depts, I'm amazed it hasn't been understood mor