Possible if not likely, but also being an anti-Harris leftist indicates the sort of person who doesn't touch grass anyway.

Though, I had seen handmade anti-Harris sign in Chicago once shortly before the election. "A vote for Harris is a vote for genocide" is what it said. I suspect that if there are some of those people do touch grass at all, they are aware of how incredibly unpopular they'd be in most progressive spaces if they openly stated they advocated against and refused to vote for Harris and would keep very quiet. Thus cowards.