I can only comment from a "smokers gate" and they check going into the smokers area but not from the chained in smokers area to the stadium. If you go to the gate on the eastern side of the Subiaco Football building (Gate 27?) you can usually get to the enclosed smokers section between the ticketing booths and the trailer selling supporters gear without a security guard noticing.

EDIT - bloody cheapskate

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[COLOR=Black]Liberty GT Spec B tuned 240 HP & 372 Nm at the hubs.[/COLOR] "Instead of banning high performance cars - ban low performance drivers"