Quite frankly, if you don't like the simple rules that are mentioned when you first signed up, you could easily avoid them by not clicking the "Agree" button and joining the site. It seems a bit silly to agree to them, only to complain afterwards. This isn't a text conversation between your mates and you on your phones.
We uphold these rules because the site has visitors from every continent (yes, including Antartica). Not everybody calls English their first language; proper grammar and spelling ensures its easier for them to read posts, or to run them through a translator if need be.