Squatting on a domain name with the intent to extort money from someone else who owns the trademark rights has been an issue. You would need to show the domain name holder knew of your registration and purchased the domain to keep it from you until you paid for it. Your situation is clearly different.
Based solely on the facts you have described, I don't think you are in a situation to seize any domains or twitter handles.
Good luck,
Todd
Answered on Sep 02nd, 2014 at 6:46 AM