Reverse entity reference shouldn't load entities from database to populate views fields

Using the reverse entity reference I noticed that some fields in my view where empty for the anonymous user. Digging into it, I end in the following comment at ReverseEntityReferences.php:

      // This is a pretty hack-y work-around to make property extraction work for
      // Views fields, too. In general, adding entities as field values is a
      // pretty bad idea, so this might blow up in some use cases. Just do it for
      // now and hope for the best.

It seems that the processor loads the referenced entities from DB to populate views field. In my case, the entity type cannot be accesed by anonymous users, so fields have no value. But the most important thing here is that it has a heavy penalty on performance, lossing all the advantages of using an external index server like Solr.

For now, it should be notice the user when the processor is enabled at the index configuration page.