"dmmdmm" (who is also a user on Twitter and here) has been ++'ed 2 times and --'ed 1 times by a total of 3 people.
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Operation Sign, User and Reason
--'ed by sugizou
Tweet: @dmmdmm dmmdmm--
++'ed by feio (季節に正確)
Tweet: dmmdmm++ 季節に正確