You are confusing The Gate and The Greeters. The Gate is all business, they check tickets, inspect for stow-aways and such. Greeters are further down the line, they greet you and hand you your map and WWW, Spanks on the ass, optional.
Noting the serious tone of my reply ... that's for the truly earnest newb scouring these boards for information.
Chihuahuas are allowed if filleted and wrapped in bacon first, to be grilled later. Yum, tasty. Not humanitarian at all, I don't eat humans. Unless they ask nicely.