Every now and then I think about how communities produce manners of speech, and how for us, non-native speakers, our use of language is primarily shaped by our online interactions.
I think this has an overall negative effect to the use of language, because people pick up patterns from things like forums (e.g. constant hyperbole clichés, everything is either "blazingly fast" or "painfully slow"), and they never had the experience of using other registers, e.g. speaking English to their mother.