Sectarianism has, more or less, been brought under control in Scottish football, even if there are outbreaks of the old habits from time to time. Racist abuse has also been tackled - not eliminiated, but tackled. Now the Association of Chief Police Officers in Scotland has issued guidelines to all eight forces instructing them to extend the recent clampdown on those other two scourges of Scottish football to anti-gay slogans. And about time, too!
Arguments about it being good to "Let off steam!" , as described in the linked article, are just an excuse to indulge in mindless bigotry. I am glad it is being confronted.
PS/ I don't like football and have never been to a match, but it is useful to remember that such unpleasant behaviour occurs only rarely at rugby matches. It's not a gentle sport, and the people who play and watch it aren't 'wimps', but they generally seem perfectly capable of 'letting off steam' in less divisive ways. That's one of the reasons why I like rugby.