Applying and interviewing for a faculty position without intent of accepting position
Please don't do this- you'll only be wasting the time of the search committee members.  Furthermore, you'll be doing something that is dishonest, and you do should not get into the habit of lying to people.  

If it becomes apparent early in the search process that you aren't truly interested in the position then the committee will probably not invite you for an on-campus interview.  If you actually are invited for an on-campus interview, then there's a good chance that it will become apparent during the interview that you really aren't interested in the position.  If you feign interest and do get an on-campus interview and then get an offer but reject that offer, then you'll have left a bad impression with the faculty in that department which will effect your relations with them in the future.  

The ways in which this can hurt the candidate are fairly limited, so the reality is that people can get away with this if they want to.  However, that doesn't make it right.