Classmethods are evil

[Ivan Illarionov]

After re-reading "Python is not Java" I finally came to conclusion that 
classmethods in Python are a very Bad Thing. 

I can't see any use-case of them that couldn't be re-written more clearly 
with methods of metaclass or plain functions.

They have the following issues:
1. You mix instance-level and class-level functionality in one place 
making your code a mess.
2. They are slower than metaclass methods or plain functions.

I really want to hear your opinions on the subject.

-- Ivan