Originally Posted by jkhuggins

Yes, it is.

But as long as someone (TSA? DHS? Congress?) insists that passenger names be checked against the No Fly List and/or the Selectee List, and boarding passes are used as evidence of that check having been performed, then a person fraudulently boarding a flight has not been checked against the No Fly List ... thereby making it a security issue.

And, yes, one can trivially circumvent that check in any number of other ways. A leaky security measure is still a security measure, though ... no matter how leaky it is.