At the end of the day, what would you rather see?It's not so much what he would do with the name, it's that allowing someone to use their trademark before they are well established opens them up to some possible troubles down the road.
If somebody who actually is infringing on their trademark comes along later, they would be able to go the route that perhaps Kier and Mike actually aren't the real trademark owners, citing how many sites using the trademark came out around the same time period. From here it would be a waste of money for XF Ltd. as they would have to go through more trouble in proving actual ownership and rights to the name than if they had just enforced it in the beginning; letting it become established as their own in the first place.
50+ sites showing their support for a great product, or 50+ sites with parking pages on them...? If you are going to go after anyone, it should be people that own sites like xenforoskins.com, which is sitting on a parking page making someone a few dollars a year.