Some Oglethorpe University students are planning to protest a guest lecturer, who is a well-known conservative and outspoken against same sex marriage -- Matthew J. Franck, who is a director of The Witherspoon Institute in Princeton, N.J. The protest, scheduled for 4 p.m. Monday at Oglethorpe's Emerson Student Center, will coincide with the lecture. Students at the DeKalb County school are promoting the protest on Facebook and in The Georgia Voice, a publication that promotes gay issues. Neither Franck nor a representative from Oglethorpe was available for comment.