Right, so it's that worst case, 9/11 scenario. While flying by the tall burning building in your 5 place helo you see a small group of survivors on the roof and decide to be the hero of the hour. Swooping down, you land on the roof to find there are 6 of them. Are you going to fit them all in? bit of a squeeze, but hey, it's an exceptional situation, what's the problem, you can already see the headlines.............
Now, alerted by the sound of your rotors, 4 more appear, then another dozen all clamouring to get aboard. Now you have a crowd of thirty plus all stood closely around your burning and turning, 5 place helo demanding one of the 4 remaining seats. Women and children first? (I don't think so!!) Are you going to be able to reason with a panicking crowd? Be able to tell them that you can only lift 6 and that you'll come back in a while for the rest? What's going to happen when you pull pitch and some of the more desperate cling to your skids? How long before someone catches the tail rotor with their head?
How long before one of those "un-familiar with helicopter" passengers pushes down on the collective?
Yes, or course we all like to think that we would "do what had to be done" when the need arises. One or two survivors, nice big obstruction free roof, big twin engine helo, experienced well trained crewman down the back, no panic...... Well done Captain, home for tea and medals.
The alternative scenario is the stuff of nightmares.
If you have not thought this one through already then do so while you have the chance and before you are called upon to do it for real.