That's funny, the text box in which I'm typing suggested that I don't post and sensitive data. Good advice, I'll try and post only data that has been calloused by life and can survive the harsh wilderness of Internet forums, albeit Cisco they are.
Moving on from that pointless but hopefully entertaining tangent...
ALS, I believe the reason it is suggested to be shut down is because ALS works on receive light, when it doesn't receive, it shuts down, much like a crybaby in an argument. There is an auto restart and a manual restart for bringing links up once they are down (or for the first time). Auto restart tries every 15 sec for 90 sec then there's a backoff period after that for a short while, something like that. If you disable ALS then your optic will constantly transmit so it's easier to troubleshoot when trying to turn up or fix. After you get the span up, you can turn ALS back on.
This is just my experience with these systems and suggestions from Cisco partner install teams.
