I've never hurt anyone physically before. Except for one time, I hit my brother in the eye with a deoderant bottle and it left a bruise for a few weeks, but that was back when I was 8... O_o. Haha.
Emotionally, I don't know. Even though people might not say it outloud, someone might have gotten hurt by something I've said or whatever. But I'm sure everyone has said something that has offended someone, because you can never make everyone happy. So, it's best not to dwell on that stuff, because you'll never know unless you're confronted about it.