Though I understand the reason behind the question - my thought on this is ...
when you think how many favourites does this cache now have, what do you do with that info - would you have known how many favourites that cache had before you got the email - what changes now knowing how many it has as a result of it getting one or two more or one or two less and you being notified
The reason I ask that, is that for me after I have had a notification (though more often I am aware as I get the cache logged notification email which also says I got a fav for that cache) I do actually go on the site and review all my caches and have a look at all the various fav points each one has.
If I get one where a fav has been removed - sadly it happens, but I do have a look at who it was and wonder why the decision was made