Walk-Ins during Ceremony?

I have seen this happen on several occasions. Some people were very courteous and stayed in the back, while others walked down to the front. I'm not concerned about this happening. The church hosting our ceremony includes staff (DOC, greeters and security) in their fee. Fifteen minutes before the ceremony, the doors of the church will be closed. Those arriving after the doors are closed will be escorted to the back of the church. Five minutes before the ceremony NO ONE will be allowed in and will be instructed to make their way to the reception venue.

I know Original. This is why EVERYONE here invites for a half hour ahead and does hospitality time. I know that when that is brought up on the forums there is so much pushback about making guests 'sit in the sun for a half hour', but it literally does not happen here; they get a glass of something and shmooze for a bit.

The weddings that have the same invite as start time never start on time and that time comes out of the cocktail hour. And I find that we're usually waiting on four or five guests who don't get there in time any way.

I had a few late guests and an outdoor wedding. The venue sent them down the way that the bridal party was going into the space instead of the side entrance, and they almost walked through the middle of my processional.Luckily they realized in time and sat on a bench until the BP walked in and then went around to the side entrance. We wrote the actual time on our invitations. I think the invitations said "ceremony starting promptly at TIME" and I made it clear on the website that we'd be on time. I walked in 3 minutes after the time we'd said it started because people were still sitting down.