I see some URLs like this:
http://www.example.com/?view=profile&id=098&hash=589e8bed895198495d987d055699d2b9
Why some sites add ID and hashed password to URL? Is it the session ID? Is there any advantage with using URL like that for user profiles?
The intent is likely to prevent you from quickly stepping through pages with a predictable URL pattern.
If their profile URLs were just like: http://www.siteadress.com/?view=profile&id=098
you could go to http://www.siteadress.com/?view=profile&id=099, http://www.siteadress.com/?view=profile&id=100, etc. and expect to find content there. If the profiles include, say, e-mail addresses, it'd be a great find for a spambot to crawl through.