Police in Merrimack, N.H., are telling people to be wary of an elaborate job scam that could result in identity theft, after a man responded to a job posting on a legitimate career search engine. The applicant was contacted by e-mail for a Yahoo instant messenger preliminary interview. Once the applicant initiated the messenger chat, misspellings and inappropriate responses from the interviewer concerned him. He did follow-up work on the company’s website and learned that the position was filled and no longer posted. The chat was disconnected when the applicant asked the interviewer for a phone number.