Mr Smith made his comment on his personal Facebook page, outside of work time. His page was
not visible to the general public. Only his chosen friends, and their friends, could see it.
That included some of his work colleagues.
His bosses at Trafford Housing Trust in Manchester charged him with gross misconduct. The only reason he didn't get fired was that he had been such a good employee over many years.
The press later found out that Trafford Housing Trust took action against Mr Smith because it was, in part, worried that it might lose a gay rights charter award if it didn't take a tough line.
He has spent a great deal of time trying to reason with his bosses, but he has exhausted the internal appeals procedure and they have refused to see sense. Now a County Court judge will have to decide whether the Trust acted unlawfully.
Mr Smith's case is precisely the kind of injustice which will become increasingly frequent should the Government goes ahead and redefine marriage - the Attorney General has made this very clear. Supporters of traditional marriage will be punished in the workplace, particularly in the public sector. It's wrong for someone's career to be damaged just because they voice support for traditional marriage.
And the serious implications for civil liberty don't end there. The widespread impact has been outlined in a legal opinion, written by a top human rights lawyer Aidan O'Neill QC. You can download and read a one-page summary of it here.
All of this shows that the Government's plans to rewrite marriage are divisive, illiberal,
far-reaching and should be dropped. Even gay
Conservative MPs 'marvel at why (they're)
bringing this forward'.