Is this a horrible idea?

horrible_idea.py

>>> class Booltring(object):
...     def __nonzero__(self):
...             return False
...     def __str__(self):
...             return 'X'
... 
>>> b = Booltring()
>>> bool(b)
False
>>> print b
X
>>> if b:
...     print b
... 
>>> if not b:
...     print b
... 
X
>>>