I suppose Twitter is a good way to exchange insults, though I've never done it myself. Perhaps I'll start. Trent Reznor, meanwhile, is no slouch in this matter.
The NIN man has slagged off that previously reported new album by former Soundgarden / Audioslave man Chris Cornell via that very medium. Reznor says of 'Scream', which has been produced by Timbaland: "You know that feeling you get when somebody embarrasses themselves so badly YOU feel uncomfortable? Heard Chris Cornell's record? Jesus".