You can comb them out if you have a lot of time. With a huge tub of conditioner and a good brush, anything is possible.
Besides the fact that I've always loved the way dreadlocks looked, the fact that I am tender headed as hell (when I heard about a hair style involving no brushing, I shat bricks), and I hate cutting my hair but at a certain point, it just gets unmanageable, I have some less vain reasons. They are also a way of keeping me natural. If you put just normal chemical laden shampoo on your head (as I am so tempted to do any time I shower at a friends house) you will rue the day. Maybe. I don't want to test that theory. I am also a control freak from hell. With natural dreadlocks, there is no control. You just have to suck it up. It's a tiny kind of chaos I suppose that you have to learn to love. There are other reasons, but I don't want to bore you guys to tears or get off sounding super cheesy. I think as time goes on, I'll have more and more reasons to keep and love my locs.