I can understand why Tiger would be upset, they aren't worried about a negative view of their name, just confusion in general.
About two years ago I remember Radioshack releasing a line of A/V cables called Fusion, and they were all pretty and high end and whatnot. But at the same time there's some company out there named Fusion Cables, who makes high end car audio cabling. They sued Radioshack claiming people would become confused on the names, and won, and Radioshack dropped the name from the product line.
So it is a valid concern, just not in this case necessarily.