The barricades are placed to keep shooters from engaging further than 7 yards. They will have to at least get perpendicular to the last target.
The no shoot is just a random pedestrian. The targets behind the no shoot are half hardcover so any no shoot hits, will not count as a shoot through. 1 bad shot on this stage could add 7.5 seconds to your time. 5 seconds for the no shoot and down 2.5 seconds for the hard cover since it's limited vickers.
John 20:29 Jesus said to him, “Thomas, because you have seen Me, you have believed. Blessed are those who have not seen and yet have believed.”