Lets put a very real example as a prelude. There are several cities across the country that offer free wifi on most public transportation systems. The biggest issue is that more often than not, if you are traveling during rush hour, you will likely get bumped off the net as soon as a few people with wifi enabled devices try to connect. Well, if you are in a similar situation or if you simply want to be able to surf the net without having anyone else riding on your network, then you should check out what XDA member bponury has prepared. Wifikiller is an app that will knock out the wifi for any device that is connected to the same network. This is a particularly useful tool also for people in the wonderful world of IT as well as for pranksters around the globe.
The app is still in beta stages but it seems to work rather well. Please leave some feedback so that the dev can improve the quality of this app.
Well, with this app you can disable internet connection for a device on the same network.
You can find more information in the original thread.
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