I think the "showing off" part can depend on your and their level. Code that is hard to read isn't immediately someone showing off, it might be that it's following a standard for that framework/language that might not be very obvious to someone new to it. I feel that way when I'm learning a new language, and come across something that's very particular to that language that looks unusual.
The exception is regular expressions. I think most people who use them are showing off :P
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I think the "showing off" part can depend on your and their level. Code that is hard to read isn't immediately someone showing off, it might be that it's following a standard for that framework/language that might not be very obvious to someone new to it. I feel that way when I'm learning a new language, and come across something that's very particular to that language that looks unusual.
The exception is regular expressions. I think most people who use them are showing off :P