Comiket 83 executive committee announced on the official website that three threatening letters, presumably placed by copycat blackmailers, were found at Kuroko no Basket
block of Comiket 83. However, they decided to continue the event with the great help of the police because it could have provoked more copycats if they had given in to the threat.
Picture of the empty KuroBas block at Comiket 83
Comiket staff stated that the restraints upon the freedom of expression, not limited to Kuroko no Basket, will continue unless the threatening stops. They said they will keep on doing their best to protect the long-standing culture.
Source: Comiket 83
Related topic: Kuroko no Basket Gets Banned at Comiket 83