I don't know if they have the same concept in the US, or Australia, but under UK Law we have the concept of a "spent conviction":
From wikipedia: "The Rehabilitation of Offenders Act 1974 of the UK Parliament enables some criminal convictions to be ignored after a rehabilitation period. Its purpose is that people do not have a lifelong blot on their records because of a relatively minor offence in their past. The rehabilitation period is automatically determined by the sentence, and starts from the date of the conviction. After this period, if there has been no further conviction the conviction is "spent" and, with certain exceptions, need not be disclosed by the ex-offender in any context such as when applying for a job, obtaining insurance, or in civil proceedings.
For adults, the rehabilitation period is 5 years for most non-custodial sentences, 7 years for prison sentences of up to 6 months, and 10 years for prison sentences of between 6 months and 2½ years. For a young offender (under 18) the rehabilitation period is generally half that for adults. Prison sentences of more than 2½ years can never be spent."
Was it 20 years ago that Assange was convicted of hacking? Non-custodial sentence was it?
My personal feeling is that you should get over it and stop hounding him.