This would be a nice option to have, but it's only useful for a small number of tech affine people who know what they're doing. If the location doesn't agree with the IP address, the app would know it's not real. And if this is used with banks or payment services people are going to get their accounts disabled.

In general, I'm not sure spreading random fake news about yourself is such a great idea unless everybody does it. And everybody doesn't do it, because if everybody cared so much about these things the problem wouldn't exist in the first place.