I’m a little bit of a hypocrite. I use javascript confirmation when deleting something. You would think that’s a good thing but it’s not, try to delete 10 things one by one and you’ll know what i mean.

For bulk action (either is delete, move or anything else) you should use checkboxes. Then you will have only one confirmation. You can’t do certain action without user confirmation. And to be sure that user will see you, you must be annoying