I pulled my own, 12 in my hand (out of 20 total, wasn't pretty). If you consider yourself a good judge of healed vs unhealed, it's no big deal. I had a stitch that was on a nerve and whenever it got pulled on, two of my fingers would twitch, so I pulled that one out as soon as possible. Those two fingers are still always asleep, but at least I can feel them so could be worse.
What onagd mentioned about not pulling dirty stitch though is great advice. I'd also recommend using a povidone iodine solution instead of alcohol, you can get it at any drugstore or any retailer with a decent pharmacy department. It's the brown stuff.