I created a Datasheet view for my custom list and anyone with Read permission can right click on a row and Add/Delete row. Has anyone seen that issue? Is it a bug or sth wrong with my environment? Anyway to correct this?Thanks

You can edit in the DataSheet view, however, the change you made cannot be saved to the server. You can find exclamation mark at the left of the modified row. Click the mark and a dialog box will show that says you don't have permission, your only option is to discard the change.

Thanks. I didn't try to save it