what do you see?

What's the consensus on talking on your mobile in a bookshop? I mean, it's not a library, but still it's quite a faux pas right? So, I was killing some time browsing in Kinokuniya again today (the really nice new big one to the west of the station) when this little incident happened...
A moustachioed balding man, possibly Canadian, was browsing nearby when his phone started to ring. Not only was it not on manner mode but the ring tone was a very loud, strange version of that piano tune everyone in England knows how to play but seems not to have a name, with the dah-dah bits replaced by a strange dog-bark-like sound (kind of like "dee-dee-dum-ARF-ARF dee-dee-dum-ARF-ARF dee-dee-dum-ARF dum-ARF dum-ARF-ARF...etc. etc."). He did that kind of panicked fumble for the phone, I thought just to shut it off, but actually to answer it and then proceed with the following conversation:
"Ye-es?........Hell-o?!....Hello!"
......
"Why are you over there?! "
......
"Well I'm here, in the corner"
.....
"Why did you go there?!"
.....
"Can't you come over here?"
.....
"But can't you come here?"
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"I found something I want to show you!"
.....
"You'll have to come and see it"
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"No, you come over here!"
.....
"You have to come here first"

At this point I made my hurried escape.