CDs with no performer credits, usually cheap theme anthologies from minor labels, bug me also. The performances are usually terrible; no wonder nobody takes credit.

Slightly differently: There's also a long history of ensembles under exclusive recording contracts making other records on the side under other names. The Vienna Philharmonic Orchestra is particularly noted for this.

It's not quite the same thing as Hatto, being more like the use of a pseudonym on the side than plagiarism (John Varley writing as Herb Boehm, that sort of thing), but worth mentioning all the same.