According to Gregory, most leads on so-called piracy come from the public. These leads are referred to Trading Standards bodies. So raids and seizures are actually subsidised by local councils. Microsoft is entitled of course to safeguard its intellectual property rights - and use what ever blunt instrument it has at its disposal. But the tactics it is deploying in its campaign against parallel importing look very dubious indeed.
Grey markets exist where companies maintain differential pricing.
And Microsoft operates a huge pricing spread for its products. But global pricing is not in Microsoft's interests. By extracting top dollar from companies and individuals with limited negotiating power, Microsoft creams more profits. The grey market reflects Microsoft's own pricing strategy. No more, No less.