Or it leads to nutjobs like the DUP having a cudgel on your gummint.

That's more a problem with the Tories and Theresa May, who were both already comfortable doing business with terrorist supporters and human rights abusers, so their eagerness in paying the DUP to prop her up shouldn't be a surprise.

I know almost nothing about German politics, but it appears their coalitions are at least done with the major parties - not ones who had less than 1% of the vote - so have a greater chance of being somewhat representative.

I'm all for proportional elections, but they can be abused and manipulated to give minority parties disproportionate power, as we see in places like Italy and Israel. As for Germany, it may well be that at some point in the near future, a center-right party will form a coalition with the AfD in order to form a government.

But FPTP gives major parties disproportionate power. No perfect system but at least with a proportional systems the power is much more proportional and representative.

But yeah, what BP said. That was a poor decision that isn't even a formal coalition.

What we need is to fix stupid voters and non-voters (mea culpa, for quite a few years).