This app was mentioned in 2 comments, with an average of 2.00 upvotes
I don't know why you would list it as a feature. It does say "optional". I was planning on using mock locations and a tool to set a fake location.
http://www.cdxlife.com/technology/
I suppose if you're a dispensary and you want to tweet your store. They also are trying to start(?) a MassRoots <em>"a semi-anonymous social networking app for cannabis lovers worldwide"</em>.. I guess if your jurisdiction is completely legalized go for it.
Maybe it's time we start using fake GPS apps like this one:
https://play.google.com/store/apps/details?id=com.lexa.fakegpsdonate