Not that I want to defend such practices as I think owning a trademark that can restrict non competitors from using it is ridiculous.
However from what I remember patent and trademark law is a bit weird in that if you can't demonstrate that you've actively and aggressively defended your trademark you could leave yourself open to lose more legitimate cases of infringement down the line.
However from what I remember patent and trademark law is a bit weird in that if you can't demonstrate that you've actively and aggressively defended your trademark you could leave yourself open to lose more legitimate cases of infringement down the line.