If they somehow manage to get an IP address associated with the shadow profile, they can use XKeyScore to see which websites you've visited. If they see you've been reading a lot of articles about the NSA ordeal, browsing wikipedia a lot, visiting websites related to cryptography and visiting a website called hacker news, they'll target you as 'politically dangerous' and you'll be put in the 'nihilist, anarchist, hasn't talked to the opposite sex in 5 years'-list.