The more general problem basically being sentinel values (which these sorts of inferences can be treated as) in stringly-typed contexts: if everything is a string and you match some of those for special consideration, you will eventually match them in a context where that's wholly incorrect, and break something.
The more general problem basically being sentinel values (which these sorts of inferences can be treated as) in stringly-typed contexts: if everything is a string and you match some of those for special consideration, you will eventually match them in a context where that's wholly incorrect, and break something.