Yes, it's safe, because if the database is up-to-date, it does nothing. Hiding it behind a login page would be a problem if the database was corrupted and the login could not be performed. But see this page if you're concerned about it.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.
April 20, 2021: Q2A 1.8.6 released!