I'm too much of an airhead to seek revenge; I get distracted by my own life. I haven't got the time or the attention span for plotting anything that might be effective.
I have found that my FEAR of the other person cheating is actually worse than what I felt when it truly happened. What has been most difficult for me after having been cheated on was the "How could someone DO that?!" In all cases I am glad I found out, because otherwise I might be stuck with the losers. I've personally no tolerance for cheaters, liars, abusers, etc. Zero.