Please.
First of all, Yanky55’s use of the comma before “and” was not covered by the “serial comma” rule.
Second of all, Mariner merely quoted http://www.getitwriteonline.com/archive/021201.htm. Not that there’s anything wrong with that, but a citation would have been nice.
My point was, though, that almost nobody has consistently perfect grammar. If you’re going to criticize (yes, “criticise” is how it’s spelled in England), however, you’d better be sure your own grammar is up to par.