One of the most effective ways to hurt maintainability of code written in any given programming language is to try to make some language features artificially awkward to use in the hope that programmers will then do something else. When has that ever worked?

IMHO, if a feature is useful enough to have in the language, it deserves a good implementation. If it isn't, it shouldn't be there at all. And if it is useful sometimes but doesn't fit well in other situations, providing better alternatives in those situations is a more effective way to avoid dubious code than just artificially crippling the entire feature to discourage its use.