Trademarks don't automatically apply to domain names - since ordinary trademarks apply to a narrow protection of people offering "that same type of goods or services". ("Generic" trademarks exists, but need t meet much wider standards of public recognition than Scala-as-a-programming-language has.)

Apart from trademark disputes, which "The Scala Community" have no chance of winning here, domain names have _always_ been first come first served. If _you_ thought scala-tools.org was a worthwhile asset, you should have registered it before he did. Same with any scala-* domain.

Feel free to get huffy about whether or not you think he should have done things differently, but trying to frame this as some sort of abuse of domain name ownership is, frankly, naive...