I see some people with titles next to there name saying lantern corps. Is this a title? If so, how do you earn it?
You get them by becoming a Fan Ambassador/Community Hero. What that means is a bit more complicated. The moderators award them to people who are shown being a positive and active part of the community. I tried to find a breakdown for you, but had no luck. Maybe someone else can direct you to a thread specifically on the topic?
If you’re talking about the Community Heroes, there’s more information on this thread:
If you’re talking about the titles that only say “Lantern Corps,” those users are members of one of the DCU groups, The Lantern Corps. There’s more info here