Posted By:
Scott Forrest(that the purpose of language is to communicate).
We used to get hammered in school for starting sentences with prepositions, using contractions, etc., but teachers didn't take into account that language has been evolving since it's inception, and the reason has usually been to improve communication.
IMO, a valid gripe is when we see pure simple laziness, either spoken or written - laziness usually detracts from the communication process. I also recommend getting a small abridged dictionary and keeping it near your computer - when in doubt, whip it out.