It's possible to post a perfectly calm, sensible, well-argued comment in one place, and post a spiteful, obscenity-filled rant in another place (or possibly the

It's possible to post a perfectly calm, sensible, well-argued comment in one place, and post a spiteful, obscenity-filled rant in another place (or possibly the same place), so, yes. If you want to get fancy, you can use two computers and click "submit" on both simultaneously, so, yes, you can, even for pedantic definitions of "while".