Bigot:

a person who is obstinately or intolerantly devoted to his or her own opinions and prejudices; especially :one who regards or treats the members of a group (such as a racial or ethnic group) with hatred and intolerance

Source

So no, I do not believe a person flagging someone on a platform that is designed to have upvotes and "downvotes" (flags). If sneak were going around flagging all women regardless of content, I would call that bigotry.

Flagging someone for content you disagree with merely out of content but without regards to race or ethnicity is called using the system. It just happens that sneak has a more impactful vote with his delegated power than most users would.