A couple of observations from a skeptic. TBT has a half life of 3 months in water, so while there can be a local impact, there is not the danger of long term impact. Sea Hawk claimed that the paint did not release the TBT above the rate limited by the EPA.
So look at some things we do know. There are statements in the article that are made by the EPA that are false. The EPA claimed that New Nautical was prohibited from manufacturing Biocop for domestic sales after Dec. 1, 2005, which is not true. Regulation was put in place, effective Dec 1st '05, which limited the rate at which TBT can leach into the water. It did not prohibit its use. One should also note that paint being applied must be applied by a licensed dealer. Notice in the article that a particular dealer got in trouble as well.
So start to put this all together, balanced with the fact, that you have the EPA with an unlimited resource of lawyers and money, against a small family owned corporation. So regardless of the real facts, and if what they were selling, really was legal, they were in a no win situation, so they punted and plead guilty. No one will know the real truth in the case, and if one does a little research, there is some question left as to if Sea Hawk was truly guilty. The EPA has the solid reputation for being ruthless and intimidating. It also is well documented to be extremely politicized. If anyone really understands how the court system works, it should be well understood that this case is much more about the legal system and government, rather than something based in reality. We will never know the whole truth.
One would be wise to learn to be a skeptic. Life in America is driven by marketing, rather than reality. Most things are not what they are purported to be on the surface.