The only examples of cheating the peer review process I know of are from people pushing bad science. Good science doesn't have to cheat.
These are probably the three most prominent examples of bad science cheating the peer review process, involving, respectively, climate denial, AIDS denial, and creationism.
1) If you can't get bad science published, fake it.
* "Environmental Effects of Increased Atmospheric Carbon Dioxide"
http://en.wikipedia.org/wiki/Oregon_Petition#Covering_letter_and_attached_article
This widely circulated article was mocked up to appear to be from a recognized, peer reviewed journal, even including a publication date and volume number. The article was never published in any volume of any peer reviewed journal. It's a complete fraud, but managed to fool enough people to give climate deniers some political clout.
2) If you can't get bad science published, force someone to publish it.
* "Human immunodeficiency virus and acquired immunodeficiency syndrome: correlation but not causation"
http://en.wikipedia.org/wiki/AIDS_denialism#In_the_scientific_literature
The author of an article claiming HIV is not the causative agent of AIDS, after receiving harshly negative reviews, invoked an obscure membership clause permitting publication in the journal without peer review. The same author is still playing games with the peer review process, getting rejected, sneaking it into publication somehow, then getting retracted, as you can read here:
http://denyingaids.blogspot.com/2009/08/goodbye-duesbergs-and-ruggieros.html
3) If you can't get bad science published, find an editor who's willing to cheat for you.
* "The origin of biological information and the higher taxonomic categories"
http://en.wikipedia.org/wiki/Sternberg_peer_review_controversy
A former editor allowed this pro-creationist article to be published in his final issue as editor of the journal. He is accused of having a conflict of interest with the author, and conducting an inadequate peer review of the article. The article was immediately retracted under the journal's new editor. Discovery Institute (a creationist pseudo-science organization with no relation to the Discovery Channel) press releases and Ben Stein's "Expelled" documentary have subsequently portrayed the former editor as a victim of retaliation and harassment by the scientific mainstream.
Frequently, but less famously, bad science is submitted to journals peripheral to a controversy, for example, a creationist article in a journal on proteins, discussed below. This strategy tries to catch editors and reviewers off guard, and does result in publications from time to time, but are always followed by retractions when caught.
http://ncse.com/rncse/28/3/creationism-slips-into-peer-reviewed-journal
And, especially often in climate denial, many deniers skip the peer review process completely. There's no peer review on the Internet, so deniers are free to post complete fiction through think tanks or blogs, knowing sympathetic media outlets and politicians will find it, pick it up, and echo it as truth, for example here:
http://www.politifact.com/truth-o-meter/statements/2012/feb/07/newt-gingrich/newt-gingrich-says-epa-plans-boost-gas-prices-25-c/