Ignoring the fact that he plead guilty and will be sentenced, just the arrest had serious implications.
This guy now has virtually no chance of ever getting a job that requires a CRB (criminal records bureau) check (let alone an ECRB check). Every job I've had in the IT world in the last 8 years has required one, and in the current economy, if they have 10 applicants with no arrests on their record and 1 with an arrest, they're not going to take the chance on him.
It means that he can't visit many countries visa-free any more. It means that his DNA and fingerprints are on file. All this for a badly timed joke.