So are all Cars with the deleted options via software mods, not getting their MOT certification? Are MOT stalls, going deep in to the engine bay and checking the EGR valves being blocked via customized hardware?
There's a misconception that if a moded car passes an MOT test, then the mod is 'legal'. This is a fallacy, obviously. All it means is that the mod was not detected during the MOT test (but had it been detected, the car would have failed). If your home was searched by the police for Class-A drugs, which they didn't find because you've hidden them really well - would you then conclude that it's proof that possession of Class-A drugs is in fact legal...?
You know under the copyright infringement laws even modifying the ECU for tuner files is illegal. Should we report these members with their 4 cars?
So what....? Two wrongs don't make a right.... the fact that one illegal practice is rife, is surely no excuse for allowing other illegal practices to become commonplace? Each illegality should be dealt-with on its own merit. What would you tell the police if caught jumping a red light? That it's OK to do so because other drivers are speeding on the motorway? That's just a lame excuse (and won't get you off the hook anyway).
There are moral issues involved, obviously, in deliberately polluting the air that other people breathe, but that's a separate discussion. If you want to remove you' DPF, then (a) It's your car, (b) I can't stop you even if I wanted to, and (c) I don't work for VOSA. But spare me the BS that it's 'OK' or 'legal' - it makes you sound like a bank robber who justifies his actions citing Robin Hood. At least be honest enough with yourself and others and admit that you are breaking the law (in the UK) because you want to save some money, you don't think you'll get caught, and you don't give a hoot about others. If you did that, then at least I'll appreciate the honesty, and the fact that you are not taking me for a complete fool.