Doesn't Phind do this already? I haven't used it much but I remember it showing its sources for answers of code-related stuff
Regardless of what the article says, "South of ..." is a common way to refer to the southern end of something in English. If it said "to the south of ..." your point would be correct.
Such people would just be less likely to vote at all if the process itself is disenfranchising. Plus it's not just a question of understanding but of wilful ignorance or even malice.
The process needs to be simple enough for everyone, and it needs to be emphasised how such a voting system will help them be better represented.
I would like to think a PR system would lead to more of a focus on individual policies and less voting along tribal lines, but if you're disenfranchised that's not going to help anything. If we ever get a proportional system it needs to come with a very good educational campaign.