A tip for subsequent reviewers: 
The above 31 changesets come from two blocked users (actually they may be the same saboteur)

>>> 南昌地主
['148082732', '148085761', '148085889', '148086076', '148086229', '148086575']
>>> 博股通金
['148011510', '148011647', '148011738', '148012024', '148012269', '148012667', '148012865', '148014391', '148014707', '148033613', '148033628', '148033694', '148033862', '148034757', '148035457', '148035589', '148038885', '148039862', '148040293', '148043382', '148044300', '148044478', '148077792', '148078188', '148078656']
>>> [len(南昌地主),len(博股通金),len(南昌地主)+len(博股通金)]
[6, 25, 31]