You don't need a ASIC to get a look at the flight deck of an airliner, all you have to do is ask. Most pilots would be happy (time permitting) to show you the flight deck after landing at your destination.
I doubt it would help much in getting you an upgrade, check in would have a list of people on each flight they would like to upgrade (frequent flyers, government employees, company reps).
As for wearing it around the airport
Keep it in your bag and pull it out at the duty free for a discount, other than that its of no use.