[virtualwhys]

Tony Morris is more infamous than famous.

In Haskell he's nobody special; however, in Scala he's known as one of originators of Scalaz, and has made contributions to the development of the Scala language itself. TM is very strong in category theory and has no problem speaking categorically about the correctness of his views.

He's a polarizing figure in the Scala community and seems to enjoy pissing people off (again, the code of conduct banners seen on Scala Google groups can be by and large attributed to TM, which is an accomplishment, thus the infamous claim).

In TM's defense, as a teacher he does force the reader to stretch beyond their current (limited) understanding. If he came across as less of an a$$hole then he'd probably have a larger role in Scala and the programming world as a whole.