There Is a Right Way and a Wrong Way to Use Twitter
A right way or a wrong way to use Twitter seems like saying there's a right or wrong way to have a conversation. There are social rules, yes, but no one can tell you how you should or shouldn't use a product, and with millions of tweets per day, people are bound to use Twitter any way that works for them.
Take for example following and followers. It's not rude if you don't read every tweet your followers send. The more followers you have (hundreds, thousands) the more difficult this becomes. It's also not rude if you don't follow everyone who chooses to follow you. Maybe you do, maybe you don't -- it depends if you find someone's twitter feed interesting or not.