Your examples are both unconstitutional (see Lawrence v. Texas for the second), so no, there are limits. Also the majority of sane individuals would not bother to vote on that kind of stuff to meet a qualified majority, not in a democracy and not without a massive brainwashing campaign (which should be banned btw). Also, as others have pointed out, this is not a ban but a moratorium. AI bros just have to wait until the hype cools down to build data centers in Maine, or build them elsewhere.