Supplement that bad boy New York F. U. mini with a 4 ft. double loop security cable. Will keep the wheels from going 'walkies', and you having to 'take a walk', possibly with bike now a 'new' unicycle.
A more elegent/expensive solution is to buy a set of Pinheads or Pitlocks security wheel skewers. Headed Downtown/City Center? or big city campus quad, Frat/Sorority Row? Use both cable And security skewers.