We have two types of pit scouting, and we don't leave these to random members of our team:
1) Pictures of the robots to use for ID purposes in our scouting. This done before competition starts by a trained team member. Smile!
2) Evaluation of specific metrics, including bring measuring devices and other equipment. This is done by senior team members (often subteam leads) and mentors. This is usually done during the competition on a subset of teams.