read_csv disable TextParser._get_index_name magic?
There is a way to specify which columns to use for an Index, but there isn't a way to specify "DON'T auto-look for an index". I'm getting some weird behavior where a big file creates an integer Index, but a smaller subset will create a MultiIndex which appears to be messing up columns and joins later.

Tracing through the pandas code now, will see if I can get a non-proprietary example... But I'd like to be able to specify in the read_csv call to just create an integer index.
