caveat lector - I will try my best to answer your questions.
1. Fullerton Airport (our Airport) is right outside the DL TFR.
As a matter of fact, Fullerton can no longer do "left traffic" approaches because of the TFR's close proximity to the airport. The typical airplane can climb out 500-700 feet per minute. There just is simply not enough room to get over the TFR in time. The best way to go is around it. Also, if you are arriving or departing Fullerton or John Wayne, you wouldn't want to be at 3000 feet that close to the airport on approach. You would want to be a lot lower. (You are landing shortly)
2. IFR is flying instrument or Instument Flight Rules. There is a big difference between flying IFR and VFR (visual flight rules) A lot of pilots aren't instrument rated and can not fly IFR. Without getting too technical, my wife is instrument rated but we don't like to file IFR on certain trips in and out of the basin because of the altitudes that you are required to reach on that IFR route. Fully loaded, our plane cannot always make it to the "minimums" (required altitude to be at on a certain airway or TEC route. ) These minimum altitudes are in place to make sure that an airplane can clear all of the surrounding terrain. Remember, IFR is usually for conditions when the pilot can not see the ground or what's ahead of him/her. One solution would be for the FAA to allow VFR traffic through the TFR if they are on what's called VFR flight following but, that is not the case. You must be on an IFR flight plan. Here's a real example:
We want to get out of the basin and go to San Diego. If we go VFR, no problem. We just watch the ground and the airspace and we go. If we have to file IFR to San Diego, we may have to use a route that goes through the Cahon Pass and out that way, because of the IFR minimums.
3. What friction? It adds friction to law-abiding pilots, I can attest to that, but what can it possibly do for the person who is hell bent on crashing into DL? The only punishment for breaking the TFR is a letter from the FAA about 30 days after the incursion. (and that's if anyone even noticed...no one watches the TFR exclusively.)
4. Noise abatement is a whole different issue. Noise abatement procedures are put in place by the airport and the community to try to live in harmony. Usually noise abatement procedures are implemented because an airport is making more noise than it once did. (John Wayne started bringing in the big jets and corporate planes.) In this case, I think that it is very useful for the airport to sit down with the community and work out some sort of noise abatement. Now in Fullerton Airports case, the airport has been there since 1920 with not too much more traffic today than it had in the 50's. Who encroached on whom? (
Disneyland was built in 1955 and Walt had to know that the airport was there.) We call it "Fly Friendly" and it has really worked in a lot of areas.
I would point out again, that a lot of the traffic flying around DL (most of the helicopters) are Disney leased or used aircraft or Anaheim police. About the only time you'll see a general aviation aircraft around Disney is during a transition or a couple of quick sight-seeing turns around.
Hope this answered your questions.
Roy