If you're on HN, you're probably a nerd, which means your Twitterstream (if you have one) is probably pretty interesting. Just for fun, click on the hashtag for any given trending topic. Note the (extraordinary) difference in quality, tone, and general signal:noise ratio.

You will realize that (a) Twitter can provide amazing filtration (b) this filter is 100% necessary and (c) the filter is exactly what the #dickbar undermines.

It's like an airplane engine that fails on purpose.