No it's used to let blowby gasses and condensation out of the crank case. If it's being subtly squeezed it's fine if it's being compressed to the point where airflow is being restricted it's bad.
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.
If you're so inclined I'm always more than happy to accept tips via PayPal. 
Tip Jar ---> 
|