The reason that the phone-a-friend isn't at risk from search engines etc is that it's not done in real time - the friend can't be watching what's being asked in the studio. So unless they're sitting ready at the keyboard when the calls comes, they're probably not going to be able to do it. And possibly if the studio producers heard the clicking of keys as they said "oh, um.." they'd stop taping and demand a different friend be used.

Handy thing, asynchronicity.

and ~20 seconds to google something is an awfully short time (I tried it on an online game :D)