As much progress as Twitter has made kicking terrorists off its platform, it still has a long way to go. TechCrunch has learned that ISIS supporters are hijacking long-dormant Twitter accounts to promote their ideology. Security researcher WauchulaGhost found that the extremists were using a years-old trick to get in. Many of these idle accounts used email addresses that either expired or never existed, often with names identical to their Twitter handles -- the social site didn't confirm email addresses for roughly a decade, making it possible to use the service without a valid inbox. As Twitter only partly masks those addresses, it's easy to create those missing addresses and reset those passwords.