Subpage redirected to the index page - penalization?

Ok, not a very blackhat question but still. Whats your take on this, what will big G think:

- Whenever a user visits a "subpage" on my site they are redirected to the index page. This would happen just if the referrer was an SE, and of course not if the user went from the index to a subpage. I believe I have seen many ecommerce sites etc doing this. So would google penalize me for this?

Metatag, javascript, 302s... All redirect methods I have heard of are generally considered to be negative on-page seo factors by the big G. Weather they sandbox your site because of it is dependant on your luck as well as how much you abuse them.

use encoded javascript with redirect, should work