Michael McCarthy argues that many of our so-called "rules" are redundant and that we should instead think about what's clear and practical when we communicate, rather than trying to follow such rules.
People get upset about split infinitives, prepositions ending sentences, speech habits such as saying 'dunno' and 'gonna', the greengrocer's apostrophe ('carrot's 30p a pound'), using a singular verb when logic demands a plural ('there's five boys in the band'), double negatives ('I haven't done nothing') and so on. Most of these don't matter as long as they're used in appropriate contexts.
It's an interesting and provocative approach, and one that contrasts with that of Lynne Truss and her followers. Although, is that deliberately dodgy grammar in the second to last paragraph?
ENA6 - Language Debates