I find this an interesting topic. Technically, there is absolutely nothing wrong with spaces in file names. The OS and file systems are designed to allow it, and frankly, users love it (just browse any company file system if you doubt me). The reality is, the only reason admins hate spaces is because BASH is so terrible at handling them. Like really _really_ terrible. I don't do much bash scripting anymore so I've gotten a bit rusty on all the ticks for escaping spaces, so much so that the other day I was trying to write what should have been a simple script, and I had to give up and write it in PHP instead.
So what does it say about Linux when the most popular shell is basically incompatible with it's own file system? Why are we still stuck with this crappy shell?