Has anyone used any of these modern gps trackers as an anti-theft device? I'm more concerned about being able to find a bike that is stolen from my house or car than I am from a bike locked up. So when I see some of the existing products or kickstarter campaigns, they have the obvious problem of only being useful if you become immediately aware of the problem and are essentially on location - they seem very easy to remove. So I've got some ideas about how to combat that, but I thought I would check with others who may have been down this road already.