I guess I don't like code that reads:

$x = $y + $z; # delete all files if running as user wilbur
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Bad names are bad names whether they are overloaded or not. If you can't trust your programmer to choose sensible times to overload an operator, why would you trust him in selecting subroutine names at all?

$x = fluffy_bunnies_are_cute($y,$z); # delete all files
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