Pamela Brown, policy director for Marriage Equality USA, said Hollingsworth could use his new role to promote anti-LGBT views.
"I don't know that it'll change anything that we'll be doing," said Brown.
But Brown warned that Hollingsworth and other Prop 8 leaders continue to use their visibility to promote intolerance toward LGBT youth.
"We've been hearing back from our survey and the stories from children of same-sex couples have been particularly frightening. We're hearing kids were running up and down the hallways of schools yelling 'Yes on 8' as a different way now of saying 'faggot,'" said Brown, who said she believes Hollingsworth shares the responsibility for that.