Depends on the locale, just like the law regarding whether you are allowed to defend yourself in a vehicle depends on locale.
Know your laws, especially when you travel. Just because it's that way at home, doesn't mean it's the same where you're visiting...
So SCOTUS needs to go after what is required in order to issue a warrant. "His guns scare me" should not qualify for a warrant. "I don't think my kids are safe in my home if they have guns in their home" should not qualify for a warrant. "He's pissed off at me for cheating on him and we're going through a divorce" should not qualify for a warrant.
"Pre-crime" is not means for arrest, or a warrant - and SCOTUS needs to make that clear, beyond a shadow of a doubt. Punishing a law-abiding citizen for a crime they have not - and may never - commit, should be illegal, and not even a consideration.