How to hide a page url from bots/spiders?
<p>On my website, I have 1000 products, and they all have their own web page which are accessible by something like product.php?id=PRODUCT_ID. </p>

<p>On all of these pages, I have a link which has a url <code>action.php?id=PRODUCT_ID&amp;referer=CURRNT_PAGE_URL</code> .. so if I am visiting product.php?id=100 this url becomes <code>action.php?prod_id=100&amp;referer=/product.php?id=1000</code> clicking on this url returns the user back to <code>referer</code> </p>

<p>Now, the problem I am facing is that I keep getting false hits from spiders. Is there any way by which I can avoid these false hits? I know I can "diallow" this url in robots.txt but still there are bots who ignore this. What would you recommend? 
Any ideas are welcome. Thanks</p>
