Another day, another question:
Does the element "Mozilla" ever occur non-initially in legitimate human UAs?
I've found one possibility:
Kik/18.104.22.168 (Android 2.3.6) Mozilla/5.0 (Linux; U; Android 2.3.6; en-us; SCH-R820 Build/GINGERBREAD) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1
I can't speak to its legitimacy but it definitely seems to be human.
Contrariwise I meet a lot of robots that identify themselves as "Mozilla blahblah" in quotes-- i.e. non-initial Mozilla. And a lot of this kind of thing:
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 1.0.3705)
-- that is, one UA nested inside another. (Most often MSIE 6, which is handy because those are automatically redirected in any case.)
Setting aside the image-search possibility, is it safe to slap down a global block on