I guess an appropriate place to use it would be when reading from STDIN when you are reasonably sure it is line terminated. 
print "Enter a url!:\n";
my $url = <STDIN>;
chop($url);

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In practice I NEVER use chop. Even though chomp is slower, I feel that with chop it's a lot easier to introduce subtle bugs. (Let's say you cut and paste a block of code.)

-Lee

"To be civilized is to deny one's nature."

In reply to Re: When do you use chop insetad of comp? by shotgunefx
in thread When do you use chop instead of chomp? by Jemts

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