The thing about Hal in Justice League is that Johns seems to be writing him more annoying than usual. He wasn't this naive or stupid in "Secret Origin" which was the most recently thing in the previous continuity that touched on young Hal. It would also appear that GL and Flash don't know how to keep each other's identities a secret from anyone using first names on a cell phone call during a battle. Real smart Hal.
It's highly likely that JLA GL is supposed to be "Ryan Reynolds" to tie in with what WB/DC thought was going to be a hit movie.