Spark Plug Blowouts

I have just bought a 2003 GT and while browsing info on the 4.6 motor I came across an alarming issue about plugs rocketing out of the cylinder heads due to lack of threads and the cheap aluminum castings. I understand the fix is a product called timeserts, but this fairly expensive band-aid doesn't help me sleep any better at night wondering if a long trip,important meeting or appointment will be interrupted/canceled by such an unnecessary and unacceptable occurrence. Even worst case would be breaking down on the interstate that I must travel every day with no shoulder to park on and where motorists minimum speeds are no less than 80 mph. Yes rear-end collision HIGHLY likely. I am aware that it is necessary to use a torque wrench at 13/lbs and only change them on a cold engine. My questions are as follow: Did Ford add more threads to the 2004 4.6 heads? Is this an occurrence on both the Windsor and Romeo heads? Were there more threads/revisions etc added to any years prior to 2004 in regards to this issue? Was there a revision on Motorcraft plugs adding more threads, and does that resolve the matter any by using the newer plugs? When the actual problem does occur, is the vehicle still drivable? I bought a Mustang because of its reliability (had two 5.0s the last 15 years and never had any probs) and I am shocked that there is no recall or any action by ford yet on this. This is ridiculous. Thanks in advance.

Thanks for the advice everyone. I feel slightly relieved. Perhaps the issue will never surface if I do the plug changes myself while strictly obeying the posted suggestions. Thanks again. But does anyone know anything about any pre-04 revisions to the number of threads in the cyl heads, and/or the newly updated motorcraft plugs that included additional threads? In threory, I would assume that more threads on the plugs would only serve the purpose of prolonging the blowout, and not eliminating said issue. Just curious to obtain answers to these questions if any one perhaps knows. Thanks in advance.

Search function was already utilized 40oz. Thats how I came up with these unanswered questions in this thread. I wouldnt have gathered all this info within 24hrs of discovering this issue if I havent searched it thoroughly. As of yesterday I knew nothing of this issue.