Companies like facebook have got to be more vigilant and more aggressive going forward. >> senator, you know, you are a smart guy. i have seen you in the hearings. you know they can do better than they are doing. if you and i were online having a conversation about our favorite foul shooters from the '80s, we would get in all kinds of ads for throwback jerseys. they know how to monitor conversations when it suits them. whether it's zuckerberg or whoever, they shine you on or they seem to give selective attribution to why they do things. when are you going to drop the hammer and say, we know an...