Peter Demers says growing a business is tough enough “without being trampled over by a media giant.” Demers publishes the AmericanDad.com Web magazine out of a small office in the South End. The site, described as “an online resource for guys with kids” has offered parenting tips, advice on academics, ideas for hobbies and activities for children and other resources for dads since August 2003. It’s a small operation. The site gets about 1,800 to 2,000 visits a day. Demers says AmericanDad is trying to create a brand and community around fatherhood, and has ramped up marketing efforts recently to...