Well, part of the reason they designed their search this way is probably to encourage people to like more things. Because now when you like things, you're also

Well, part of the reason they designed their search this way is probably to encourage people to like more things. Because now when you like things, you're also helping out your friends, by giving them a recommendation some time in the future. If Facebook advertised that bit in some way, or just if they design the user experience right so that you continue to be encouraged to like things or enhance your profile, then they should be able to adjust user behavior a bit.