I know that I did include that in my suggestion, but I think free is better. It would ultimately be up to the staff if they ever implemented something like this.
Well of course, people spam journals and polls too. But really, a character limit for "feeds" would need to be in place. Additionally, a posting flood limit would need to be in place, like with commenting if you post more than x comments in y time. It would need to be a lot stricter than that restriction, but you get the point.
Yes it isn't.
For one thing, you shouldn't hold back change -- dA is completely different from them. I don't have a Facebook or Twitter, so forgive me if I'm wrong: Statuses on Facebook are your main method of spreading things there. People share, like (), and comment on them, and so it becomes the most common method of communication on Facebook. Tweets are literally the only thing you can use on Twitter, and they can come from many places (like if you tweet an article or something). Tweets can be shared and stuff. My suggestion is just a supplement to communication here: it is one-way, from you TO your watchers. They can't comment or share your feeds because this system is literally only for making short announcements. This would not replace journals, polls, art, or community here.