Why do girls block guys on Facebook?

I made a post on Facebook where this girls friend complimented her picture saying "beautiful inside and out". So maybe it's because I didn't know the girl that this happened I don't know. She added me as a friend, but I said "she looks like she's a good girl😊" Anyways, I login later and find both the post and her entire profile is gone. She blocked me for complimenting her. Lol wtf? Maybe it was odd because we didn't know each other but really?
Why do girls block guys on Facebook?
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