In the past when you've unfriended people on facebook, what were the top reasons?

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I blocked my step-father because after he and my mom separated he was creeping on my fb to see what she was doing
I blocked my sister and her bf because we had a falling out and I didn;t want to see anything they had to say or have anything to do with them (her bf ended up creating a fake account to try and get to me and my bf but it didn't really work that well for him)
and I blocked some guy I don't really know because he kept sending me weird messages that I couldn't understand and wouldn't leave me the f*** alone.
and I blocked another guy because he kept trying to talk to me like "getting with me" but then would talk about how he was so in love with a friend of mine, and he started asking me weird questions about my ex bf's genitals who the aforementioned friend was currently dating and I thought it was highly inappropriate and he started lashing out because I wasn't giving him the answers he was wanting.