Villainize is not the word... its not being a villain to expose an affair anymore than testifying in acourt of law that you witnessed a murder taking place... are murder witnesses being villains?
Something is under attack here.. your HOME... and YOU are the witness... the other abandoned spouse's home is ALSO under attack.
If someone was trying to BREAK INTO the other spouse's home would you expose that so they are WARNED that their HOME is in danger?
Sorry but this is ridiculous... exposure is the honest thing to do... are you going to wait for that wife to get an STD and die of aids or something before you wake up and realize that wife needs your HELP and you are sitting there doing NOTHING to help her?
This IC really did a number on your train of thought here... its OLD SCHOOL THINKING and it does NOT WORK.. its 2010 for goodness sakes not 1950!