Chess database question

I'm using Chessbase12, downloading the Week In Chess game downloads every week and adding them to my reference database. I notice quite many games are only 1 or even zero moves.

Should I bother to delete them? I'd say yes, because they add nothing but size and "junk" to the database.

If not delete, why keep them? A real reason or just "laziness"?

I also notice there are quite many double game entries when downloading the TWIC files. I also delete these each time. It takes a moment but I think it is worthwhile to have clean data.

How do you do it? Thanks

yeah, i delete everything under 5 moves.

Longer than that might be a cheap opening trap I need to know about :)