I never got a blind invite... playing since 1.0 lol (granted im in an FC btu even before then, and linkshell wise- get nothing) but well if it helps you sure, but i think some players may set decline and then forget about it and at some point when they will be okay with being invited they wont receive it. So i think when an invite is auto declined should get a msg: "an fc invite by the player "name surename" has been declined.

sry for grammar im eatting lol