paying for over baggage allowence

Not sure if any of you could answer this or even if i should be asking, but, when we came back last year ( dalaman) we checked in and were over the allowence, and was told to go to another desk ( opposite the check-in) to pay the extra, then went through passport control. Once in the departure lounge, i couldn't help thinking 'Why the hell did i pay for the extra' as no body checked if we had or not......so this got me thinking Could i have got away with it? afterall it was quite a bit of money especailly when your on your way home.