also, with certain tuners, you can shut that DPF system down. It wont hurt the engine at all. Only catch is you must have the right tuner and keep it so you can toggle it back on for emissions testing if required.
It voids the 100K warranty, and is very illegal. AND ford can tell you flashed the ECU. It has a key count, how many key cycles after a re-flash. No way not to get busted.