Why cant we put - or ' in our character names anymore?

Question

If you dont mind explaining why some character names have these symbols in it and why we arent able to do that now in our characters names that will be great :)

Answer 1

Source (News from Apr 08 2008)-

However, in order to keep a rather unified look to all names, we have added some more technical limits to create names. You cannot create names with more than 3 words anymore or names that contain special characters such as a hyphen.