The following is a quote from nostv.org, a site arguing against BC-STV.

Proponents say because STV it is more proportional “overall” if is a fairer system. But a candidate in a two-member riding in northern BC can get elected with 33.3% public support while a Capital Region candidate can get elected with just 12.5% of the votes cast. This means some MLAs have had to win far more support than others to be elected to the BC Legislature.

At first, this sounds horribly unfair, but consider the following scenario. Let’s say we have Riding A with 1000 people and 1 elected representative and Riding B with 2000 people and 2 elected representatives. Riding A representatives require 50% of the vote, whereas representatives in Riding B require 25%. The percentages are different, but both still require 500 votes to win.

To say that these percentages are unfair is disingenuous to the argument. Preying on poor mathematical intuition? Come on now. Try raising a more legitimate argument: STV results in representation that more closely reflects the popular vote, but results in minority governance.