If the society is matured enough, it would render something like
the sedition act redundant.
Hence, IMHO, the use of sedition act to protect against gays
interests is rather moot. The most important thing is still to
allow people to understand gay issues based on more objective
viewpoints.
Also, you are right in saying that discrimination is rather
widespread in the society over many different demographic lines
that can split people up. The move towards tolerance and acceptance
of diversity is not simply through the Sedition Act, but to educate
people.
But then, there might still be a long route ahead.