If we found some one made spamming in his website. Copy the content from some were else. Repeated content on every web page then how we can submit complain of these kind of website in google.
You need not to worry about it because google caffeine is more smarter and they detect it within 48hrs and delist the site from the search index - if the site is actually spamming - also with current google panda update it is rather impossible to do such copycat tricks and rank better... Literally impossible to cheat google
Yes exactly, try to focus on your website, not on your competition, from competition take only the good part
You can fill in a spam report in Google webmaster tools @ https://www.google.com/webmasters/tools/spamreport