Internet is a huge network and deleting yourself from Internet is not really that hard.
There is a website named deseat.me works in a very simple way. Users connect using their Google account. Then, the application finds all the services, websites and mailing lists linked to that particular Gmail address.
This can include accounts on social networks, online stores and dating websites, for example. It can take some time to find everything if your inbox is full or your online activity is particularly rich and diverse.
