1) Has anyone at Community Air or the City of Toronto (i.e. David Miller) approached Porter and the TPA to regulate the Engine Runs by limiting them to, for example - 9AM to 8PM? 

Anything outside of these times would be subject to the same fine as a landing after curfew ($5000?? anyone know the amount).

2) What about the idea of a 2 tiered curfew to allow late Porter flights to arrive up to 11:30PM and any time afterwords flights MUST land elsewhere.
Any arrivals after 11:00PM would be subject to a $10,000 fine which would be split with the TPA and community resident groups for relevant waterfront improvements. (This is similar to the program in place in Belfast at their city airport where the later a flight arrives after curfew, the higher the fine and the greater the proportion that goes directly into the airport area community.) Perhaps late engine runs could contribute to this pool of money as well.

At least this way, if Porter wants to give up all of their profits for a flight just to arrive late and pay a fine, the Community should benefit financially.
I know that money will not deafen the sound of engine runs or late night arrivals but, given that under current circumstances, the airport is likely to be around for many years, at least try to gain some financial advantage for community improvements.

On a related angle, Porter should also be required to sponsor cultural activities on the waterfront to show some connection to the community.
Have they already tried this? Has anyone seen any Porter sponsorship on the waterfront? I don't know - I live near Pearson airport.

Together, these ideas will hopefully reduce noise during the most sensitive hours and hopefully provide a pool of funds for neighborhood initiatives.
It all probably sounds Utopian but I think it might form the basis of a good starting point for negotiating realistic compromises from Porter to help their residential neighbors cope with airport activities.

I believe that, despite what some in the neighboring airport communities think, Robert DeLuce is an astute businessman and would take notice of any initiatives that could even slightly improve Porter's standing in the community. A positive & constructive approach might bring at least 3 benefits to the community.
1) Financial means to improve and upgrade leisure & cultural interests.
2) Forge a genuine and mutually beneficial relationship with the TPA & Porter to strive for consistent monitoring and improvement of airport activities.
3)Create a system to incorporate constructive Feedback from the community as a critical component of airport operations & directives.

I think it might be time to try a different approach. Unless someone has the Silver Bullet that can close the airport, the next best idea is to work closely with Porter & the TPA.

Good Luck and Take Care!

Joe.