To borrow from the Beastie Boys, Google's "crystal ball ain't so crystal clear". It appears that a successful sabotaging of a website is easier than one might hope. lots0 at Threadwatch points out that using the non-canonical version of a domain to hurt the rankings of a competitor is an easily accomplished task and one that's exceptionally deadly at Google.
I recommend reading his full post, but here's an excerpt:
If however, when you enter the URL without the www and you end up at the non-www URL and when you enter the URL with the www and you end up at the www URL your site is prime for a major dumping on.
If your site is not protected someone could; Find some places to drop some links for you. This evil person could drop some links using the non-www URL (or if the site is set up for non-www linking link to the www page).
Very scary material and one that everyone should be aware of. Make sure you 301 those non-canonical domains back to the canonical version ASAP as this tactic is now common knowledge.
When I use the Blue Host C-panel to redirect I end up with an endless loop which is what was happening when I went and altered the htaccess myself.
I have been using the canonical tag is that enough?
Would using my Web site's cPanel "Add Rediect" function accomplish the following?
"Make sure you 301 those non-canonical domains back to the canonical version ASAP as this tactic is now common knowledge."
I read the article here: https://www.seomoz.org/articles/301-redirects.php
Isn't this what cPanel does for you in the "Add Redirect" area?