I've had several troll accounts in the past, e.g. Skinhead and Josef, but my motive was traditional: get a rise out of people, usually by taking an extreme right, extreme left, and/or fundamentalist religious position. The Legion trolls are more 'stalkerish' than anything I'd ever have the time or desire to operate. Also, even though I enjoyed fucking with people, I had my limits. Legion by comparison is the creepiest ass mother fucker I've ever encountered.
All I can say is whoever runs those accounts must surely be a loser in every sense of the word: no job, no money, no girlfriend/wife, no life. We all joke about him living in his mom's basement, and sadly, that's probably not far from the truth.