It's funny you mention Perl. I assume you meant Perl 5. I have toke.c open right here. You might find the *SPACE macros illuminating. They're used in functions to disambiguate lexing of, for example, unary functions, non-predeclared barewords, line number detection, unary operators (a comment there gives an example of rand +5), version numbers, method calls, use invocations, shebang line parsing, line number detection in string eval constructs, the unary minus operator, the various occurrences of the > token, and I'm only a third of the way through the file.
Can you be more specific than "I don't like Python's indentation, therefore any language with whitespace rules sucks?"
More specific about why whitespace rules suck or more specific about why the above 3 examples *you* asked for fit the bill? I can go in depth either way but rather give a focused answer. I'm not flaming you, so if this is about discussion please reply and if not, don't bother. And yes, perl 5 is what I mean when I say perl. Be ready for the same suffering twins go through when they're named practically the same after p6 is born, though.