Yahoo Mail system filters - spammers mail?

If someone from another account (gmail, hotmail, yahoo.hk, yahoo.au or those emails from Nigeria for example) happens to keep sending you emails, how can we, the United States of America Citizens, be able to protect our personal accounts even though there is spam filters available and limited to some of the account holders of Yahoo Mail? Is there any other method besides "delete" that we can use. The FCC tells us that it is illegal for anyone within the USA to give information of email context to the "spammers", but it is not illegal for them to give us information. Whenever you get spam in a yahoo mail account and try to forward it to "abuse @ yahoo" or "spam @ uce.gov" you get that thing where you have to interpret those incredibly unreadable #s and letters and type them in to "prevent spam." In the past month I've sent back at least 500 spam messages all coming from yahoo e-mail addresses! How come the SPAMMERS are able to send out hundreds of thousands of crap messages when I can't even complain to the alleged "authority" without getting myself into trouble ot violation of the Terms of Use policy?