User blog comment:Ucel/Recovering from being banned/@comment-212.121.142.197-20130114172926/@comment-79.249.114.131-20130114202143

It is very unlike. Game ID contains 16 hexadecimal characters, so there are 2^64 = 18446744073709551616 possible combinations. If you change two characters (for example by increasing) the chance to choose the existing ID is still something like 1/72057594037927936.