Lots of false information above:
1. NASA ASRS must be filed within 10 days to provide any sort of protection. It can even be filed online now.
2. It doesn't matter if the FAA Inspectors, AFFR, Secret Service, Police, and FBI are waiting for you when you land. You've got 10 days.
3. 91.25 prohibits the FAA from using the ASRS report against a pilot. There has NEVER been a breech of this rule. FAA has tried and been denied with both the NTSB and NASA suggesting that FAA not attempt that again.
4. There is no requirement to have a problem to fill out a ASRS report. You can do it for confusing runway signs even if you didn't have a problem.
5. ASAP programs apply to 121 airlines and provide a method for FAA to penalize the 121 carrier. ASRS can be used by 121 pilots with ASAP programs.
6. There is no limit to the number of ASRS forms filed. There is a limit to how many times in a time frame that the filing of a report can stop the sanction from being carried out.
7. Any facility can forward a 'call this number' request, even days or weeks later. I've overheard some repeat offenders get tagged this way. "Cessna XXX, when you land, call this number regarding a flight last week."
8. Dropping under ATC RADAR does you no good. Luke's RADAR works quite well and overlaps PHX's. The violator tag stays for quite a while after the target is lost.
Never underestimate the powers of an irked controller's supervisor, especially when it comes to Class B incursions. Uncontrolled airports have CTAF, tower, especially PHX tower can listen in. If you don't give position reports (downwind, final, etc), FAA will happily add to your charges.
Tower also has the phone numbers of the various FBOs. They can easily call and ask who is in the pattern or just landed.
You never know when an FAA Inspector will be on scene, either. The Inspector could be doing something completely unrelated, get a call, and is now looking for you.
Depending on how irked they are, the sheriff or local police can be there, too.
9. PHX Controllers and FSDO have a reputation for shoot first, ask questions after you're buried. Wouldn't you feel stupid to not have filed, having a suspension on your record, then be grounded for 30 days, when you could at least have filed an ASRS and still be flying?
Read the regs. Read the NASA ASRS documents. Then get off FI and file an ASRS ASAP!