Not a lot of stuff lives over the middle of the ocean or even under it past the continental shelf's. Further, the ocean really does dilute this stuff to a rather extreme degree. Granted, it's still an issue, but it's simply a smaller one than CO2.

Again, this is a case of "its not bothering me so its ok" ecology.

This is really far from true.

Acid rain is one of the primary issues with SOx pollution. It concentrates in rivers for example because the volume of rain water to overall water is very high. In the ocean new rain water never makes up a significant fraction of the top two meters of water.

PS: There is no need for gut reactions here, it's not hard to test for sulfur compounds.

PS: First line "When carbon dioxide (CO2) is absorbed by seawater, chemical reactions occur that reduce seawater pH, carbonate ion concentration, and saturation states of biologically important calcium carbonate minerals." http://www.pmel.noaa.gov/co2/story/What+is+Ocean+Acidificati...