I have seen CM's ask for ID when guests were using the So Cal tickets, this last trip there was a group that was 3 or 4 groups ahead of us but we could hear the discussion, the guests were getting quite testy, the CM called the lead over, the lead said they had to have someone in their group with a So Cal ID or they had to go to the ticket booths to upgrade, they were not allowed in with the tickets as they had no So Cal ID. As we got closer we could hear the lead on her phone or walkie (couldn't tell which) speaking to the DCA entrance and describing the party, she wanted to make sure they were going to get in over there either.

She was also watching all the DL booths to make sure they weren't going to try another entrance there.
Bottom line, have someone in your group with a So Cal ID.