It is well known that Republican run States have pushed for greater use of the most complex ballot papers and electronic voting systems because the Republicans know that people they would call white "trailer trash", who mostly vote Democrat, are more likely to spoil their ballot papers by mistake because they are confused how to fill in their ballot papers. Indeed, it has been argued that the 2% plus of the vote not counted in Ohio at the last presidential election could have tipped the state back to the Democrats had the votes been counted manually.
So it really should come as no surprise that the new voting system in Scotland saw a higher level of spoilt ballots in Scottish seats that were more economically deprived.
1) The lessons from this ? Only have one type of voting system on one given day.
2) Educate people on TV, through information leaflets and at school about how to vote.
3) Stick with first past the post or have a simple version of proportional representation like the Alternative Vote,which I prefer to the single transferable vote anyway - even if it is Lib Dem policy (oops, disagreeing with party policy again !)
Note : Please note I am not calling economically deprived people in Scotland trailer trash.