lucy24 - 12:57 am on Jan 30, 2013 (gmt 0)
I got other comments too
What a lot of talkative friends you've got. (This is assuming for the sake of discussion that the first set of answers were genuine comments from real humans. Gotta say they seemed to be amazingly similar to the "lump it!" genre of WebmasterWorld posts-- the ones coming from people who understand your position on some given subject, but happen not to agree with it.)
Now could you please go back and ask them why they were using Image Search in the first place. This is absolutely crucial and everyone seems to be ignoring it. You have to know what the users want in order to know when, and whether, it's to your advantage to block anything. You have to know what the users want in order to offer them something better than what the search engine has.
And then, finally, go back to those ordinary, non-www-professional humans and present them with the concept of a webmaster blocking a search engine, thereby preventing the contents of your site from turning up in search results. I will be very surprised if the reaction is anything other than "Huh?" and its synonyms.