How to suppress "new" indicator for imported content? Drupal works off a "history" table to keep track of the content you have looked at (in the last 30 days).
When you import old content that users have seen already it's shown as "new" because there is no entry in the history table yet.

I could insert records into the history table for all users and all content. I remember someone posted on d.o. about a "trick" that doesn't require inserting records into history, but I can't find the reference now.

Any suggestions?
You could suppress this in the theme layer, by doing a rewrite on the rendered output? That might be much safer than any kind of database hack.