RockyMason:
HOW???? U CAN'T STATE SOMETHING TO BE THE CASE WITHOUT A PREMISE OR ELSE U ARE BEING IRRATIONAL!
You are calling people names before you heard the argument. Is that rational?
Take taxes for instance.
Taxes pay for various things available to the public without the need of per user fees. For instance sidewalks in cities, the military, the police service, fire departments, to name just a few. In many jurisdictions taxes are lower for married couples. The more married couples the less taxes paid to the collective coffer, but the cost of the above mentioned utilities and services remains unchanged. Or consider health coverage for a family. Medicare? The prices and fees depend on whether the individual is single or a part of family.
Things like adoptions. If gays are married and considered exactly as any other couple then heterosexual people would have even more problems adopting children as there would be more competition.
Would the difference be substantial on a per capita basis? I don't think so, but it would influence all in some way, which is contrary to what you wrote.
bajka:
Then when nobody is looking, nuke the island !
This is a silly idea.
Nuclear radiation is known to have adverse effects, some of which are not fully understood. Additional nuclear explosions may lead to some gene mutations, and godknows if those would be mutations leading to homosexuality ;)