Guy's Behavior

Why do guys add you on social media again if they were the ones to block you in the first place?

Some guys were really rude to me and then out of the blue a year or two later they message me just to say hi. Is this normal because I find it really odd behaviour. I prefer not to engage with such asshokes after they ghost me
Why do guys add you on social media again if they were the ones to block you in the first place?
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