You can't stop them, even you are notified that someone is opening your wallet. And maybe this is the reason why no one step up to create this kind of notification.
So to fight out this hackers and criminals is learn and tool yourself on how to protect your wallet. For sure you can found a lot of tips and tricks in this community.
Not all the time I think, because like me, I mostly invest on PoS coins like Atom, With 21 days undelegating process so I can anticipate transfering to other wallet.
And what I said in my post I didnt find any related post to this, then I take the chance to ask this just in case .