If I understand it correctly, Pixie is taking a random object and trying to stuff information in it?

You are doomed, man, you are doomed. But that's your own fault, because you break a cardinal rule of OO programming: encapsulation. Don't poke around in someone elses implementation.

If you think array based objects are a problem, how do you want to deal with scalar based objects? Or filehandle based objects, like some (all?) of the IO:: classes?

Of course, you are not free of problems with hash based objects either. Such an object might have already a "__Pixie" attribute. Or it has an overloaded stringify that's going to do something with all the key/value pairs. Not to mention all the existing techniques out there that prevent accessing/setting keys that aren't in a predefined set.

Abigail