The original posters premise was the way to make government dragnet surveillance banned was to do a public one. In general it's a good principle however I'm not sure in this case.

I can see how a public flock, which is just a queryable database, would be ok under the current rules. But would it make the government want to regulate? They could just continue to go after data use where legal asymmetry already exists.

You could frame almost any use as some sort of stalking/harassment.

Even in this case if they shut it down, government carve outs would apply.