Reason behind so many 1017 errors.
People are going afk in the inns and not logging out. That's why, even at odd hours, you'll get this message. Prior to this week, I was able to get off work at 8am and log in with no problems.
Now, I see even people on my friends list as AFK in the inns during times they never play. This is incredibly selfish and there should be a hotfix/maintenance to auto-log out people that are AFK for more than 20 minutes.
Edit: I tried this myself, before posting, but forgot to include it. Just to be sure, I tried doing the same before going to bed. 7 hours later and I was still logged in and still in the inn in Ul'Dah.