It would be cool if we could prevent relating no fitting url's from musik-sammler. Right now it is possible to relate an artist page from musik-sammler to a release or release-group on musicbrainz. it would be nice if we could prevent that in a way similar we do for discogs links (and allmusic to some extend). musik-sammler has their data ordered in a similar way musicbrainz does so 1:1 relations could/should be enforced.
here's a example on how their pages relate to mb entities:
can be identified by the "artist" part in the url
can be identified by the "album" part in the url
can be identified by the "media" part in the url