IF the casinos dont allow card counting...and you count cards...then its defacto cheating(playing against their rules)....cheating that leads to stealing.
why else would they maintain photogrraphs of card counters and hire people to identify them. The card counters are cheating against either written or unwritten rules.
you can walk up to a craps table and say that you have a system..and proceed to win and no one will touch you. However if you walk up to a BJ table and say you have a card counting system....they will toss you before your first hand...before you can even prove to them that you can win.
and why would the "average joe" floor guy call security to thow you out as an announced card counter.....because its against the written or unwritten rules of the house....and going against those rules is a form of cheating and or stealing