Shooting through the mesh is fine as I shoot stone tips thru the mesh. If you decide not to use the mesh for turkey be sure to ware black, cover the bow in black, shoot dark arrows, and use a black face mask. The general rule on when to and when not to use the mesh are, if hunting turkey you can use or not use the mesh and ware black. If hunting deer ware black and use the mesh.
Never open other windows as this will silhouette you. Try this, have someone sit in the blind waring black with the mesh up and down but no other windows open. Then get in front say 30 yards and I am sure you will only see black in the blind. But if you open any other windows you will now see the person silhouette in the blind even if the mesh is down.