Steve did follow, watching Clint move through doors with some card to get through. He still wasn't used to that. Then again, in his day all cards were paper and normally issued by some agency. They didn't even have credit cards. So it was still weird to see them open doors.
As they moved away from Claire and out of the elevator into the 6th floor, he looked over as Clint asked about his intentions. Steve looked over with a sigh. "I don't know. I just think I should be monitoring the use. I know it isn't my place, but I knew Erskine. I would like to investigate each case using the serum, and make sure it was for the right cause."
Even if they hadn't perfected it, and it was still wonky, Steve felt a responsibility for the use of the serum.