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Altering parameters i can do easily already, with the right cables.

DMCA does nothing to prevent this.

and as mentioned, you can just replace the ECU if you really want.

But i think both of these are significantly easier, and very different, than flashing new software onto the ECU. :)

My point was simply never to underestimate the ingenuity of clever people working on something cool. If something cool is possible, then no matter how impractical there's probably someone out there interested and dedicated enough to make it work.

It's a numbers game. There are always going to be some people who do this, but how many? If 10% of people are hacking their car to violate emissions, that's a problem. If it's one in ten thousand, that's pretty much ignorable. The ultimate goal with emissions control is merely to keep the total down. If a few cars are blowing past the limits it doesn't really affect that.

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