Can a language be abused?

K. Scott Allen has a great post showing an “abuse” of the lambda syntax in C#.

But I’m wondering, can any use of programming language really be called abuse? The language designers and creators put the ability to create the hack described above into the language. If they didn’t want you to do things like that, why put the ability in there at all? Using undocumented calls within the language to do strange things is one thing, but simply using calls within the language itself?

What are some of the best “abuses” you’ve seen of a language?