You are obviously riled up. But you cited me incorrect, creating a strawman you argue against.
You say: “I cannot spam and harass” (here on itch). That’s a false statement, because YES you can
No, I did not.
I cannot spam and harrass you privately.
That was the complete sentence.
Any harrassment would have to take place in public, and if it is indeed harrassment, report the account you would block, to the moderators.
Same for 1 star ratings for fake accounts. Itch does remove those if you tell them. But a single disgruntled user that downvotes your stuff is not blockable, nor should it.