take on the airplane stub snub

Considering how often I fly, it's surprising how infrequently I have a problem with my SkyMiles.  100,000 miles in per year and Delta accounts for almost all of them… the problem is that they never seem to capture all  of them which is a bit tricky.    Last month I flew from Bucharest to Brussels on Brussels Air which is a SkyMile partner, before I boarded I gave them my frequent flyer number and never thought about it again.

Fast forward a month as I check out the miles I have accrued recently and I noticed that these miles are conspicuously missing..   I called up Delta to get them added and they told me that I would need to submit the ticket number, date of travel and a copy of my boarding pass.     Now getting a ticket number and date of travel is easy enough but how the hell am I to keep a boarding pass.  I fly on 50 flights per year, and most of the time I toss that little ticket the second I get on the plane.

Why in today's age do we still have to present a physical boarding pass.  Can't these airlines look into their fancy computers to see that I was on the flight. 

And what the hell does a boarding pass mean, who cares if I even flew on the flight because I paid for it.. and really it doesn't prove you actually flew it just proved that you checked in and got a boarding pass and left the airport which is really no different than showing my initial bill for the ticket which also doesn't prove I flew but does prove I paid you $500