Will Google devalue/deindex my site for doing this?

I am going to create thousands of user profiles on thousands of forums with links to my site using XRUMMER. Will Google devalue/deindex my site for doing this? If not, will this method help me to rank for specific terms I set in my anchor?

Thanks

if your site is brandnew and you never made any other links.. yes it is possible your site will get sandboxed.

if your website is older and allready got 500+ good links, this could help your rankings.