If you think scoring an own goal is well played, the SNP did great. Smacked themselves right in the face with the ball as it bounced over the line.
The SNP were amazingly foolish to intervene on an exclusively English/Welsh issue, and strengthen the need for legislation to prevent this kind of opportunistic messing around. Just whose constituents were the SNP representing, and where is democratic accountability here? No ones, and it's not present. The SNP might as well start to argue they should intervene in another country's democratic affairs, which I do not put beyond them, given their arrogance, how belligerent they have become, all fueled by the deluded leftwingery they preach.
That the SNP chose to flex their muscles on this issue, regarding fox hunting, was remarkably daft. Cameron (who knew he would lose even if the SNP abstained), deliberately tried to smoke the SNP out and see if they would dare to vote on English/Welsh issues. Because the issue at hand is a relatively minor one, Cameron could cancel the vote and allow the whole English Votes for English Laws point to dominate, as it rightly has. Now, if the SNP had been smarter and waited for some issue to crop up which Cameron could not cancel the vote on so easily (these kind of issues just do happen over the course of a parliament, only a matter of waiting), and then timed their voting on English/Welsh matters to defeat Cameron on a matter of greater substance, then real damage might have been done to the Tories.
But the SNP, like babies with rattles, could not resist making a noise, and making tougher legislation to prevent this kind of screwing around of theirs more likely.