Hint: a laser that you can't see can still blind you...but you won't realize that you are being blinded until it is too late. Black ops has used UV lasers for exactly this purpose. An IR laser is less energetic than a UV laser and would take longer to work, but it could still blind.
It has been difficult for civilians to get infrared lazer sights until now, so it is the time to aquire them.
You are correct. Good Second Amendment items.