Cast members of “The Walking Dead” are among the current and yesteryear celebrities whose autographs offered in the marketplace were frequently forged in 2014, according to the latest “Most Dangerous Autographs” list compiled by PSA/DNA Authentication Services. By JIMMIE TRAMEL The next victim of “The Walking Dead” could be you, if you happen to be an autograph chaser. Disclaimer: You don’t have to worry about this if you go to something like Wizard World Tulsa and witness a cast member of the show autographing an item for you. Seeing is believing. Four actors from the popular zombie series appeared at the pop culture convention and signed autographs for a price. But PSA/DNA, the world’s largest third-party autograph and memorabilia ...