The airlines should require entry of your FF# and PIN to verify entry. I know I already got (and posted on my wall) American's Platinum number. And Delta's Gold number now (thanks!)
Of course, they probably wlil get with the times and restrict access eventually, but just in case I'm stuck and need to get on Delta ... it's in my wallet
[This message has been edited by dg1 (edited 07-15-2000).]