Yes, I've namechanged because I am scared of AIBU!! 
I think the person who did this first (I've made sure there is nothing identifiable on the photo, it is a picture I took) was a twat. I acknowledge that maybe this person had to park like this because someone else did it first.
A disabled bay means that you park in the middle bit, and the hatched areas either side are for space for getting out, yes? Or have I been doing it wrong all along (I have a blue badge myself)?
Surely if one person parks on the hatched bit, it then means that others can't use the benefit of the hatched area for getting out? Potentially meaning they can't park at all and end up going home! (As a lot of end bays only have hatching on the car park side)
So, was this person bu (or are there reasons I havent thought of why they would have to park like this), or am I bu for being annoyed about it?
By the way, when I got here, there were other cars there, all parked wonky like this.