@ Rocknbill - I don't think you grasp what I wrote.
Many hackers use Google SERPs to find targets for their automated hack attempts. I won't name the software here, but it uses Google serps to populate its database for URL's to attack.
By restricting search engines from indexing your contact page and secondly making sure that your contact page is named something else helps decrease attacks.
You can't be hacked if you are not found in the first place.
However, once someone specifically targets your contact page, then having other measures in place is definitely necessary.