That isn’t stalking
Your comments are public, and you clearly know that.
Stalking is a serious issue in which you would be a victim that is in an unsafe situation, which you’re not just because someone goes through your PUBLIC comments.
And what he did wasn't harassment either,
Harassment would also be putting you in a situation in which you feel scared for your safety, threatened, or in a hostile environment. Mockery ≠ harassment.