Airline Travel Charges

Now a days most airlines charge extra for the following: 

Extra if you want a window seat. 

Extra if you want an aisle seat. 

Extra for checked baggage. 

Extra for food 

Extra for a bottle of water. 

Extra (in some airlines not all) to use the bathroom. 

Since I have travelled a lot all over the world I have 2 suggestions for the airlines to consider: 

When the cabin pressure fails and oxygen masks come down, it should be available to only those who pre-paid $7.50 to use it. (It is like a flight insurance. Passengers should pay this fee while booking the ticket.) 

(I digress. Once I was travelling from Chennai to Delhi. After landing in Delhi, the plane was taxiing but most of the passengers were standing and removing their carryon luggage. The flight attendant pleaded with the passengers to sit down but failed. She informed the captain and he immediately put a sudden brake. Most of the passengers fell on the floor.) 

So, I have a suggestion. Charge $50 if you want to get off the plane quickly ahead of other passengers. 

Do you have any other ideas to charge the passengers? Please let me know. 

Thanks.