Try submitting a URL from the following domains, and it will be automatically flagged (but you can't see it's flagged unless you log out):
- archive.is
- watcher.guru
- stacker.news
- zerohedge.com
- freebeacon.com
- thefederalist.com
- breitbart.comEdit: about 67k sites are banned on HN. Here's a random selection of 10 of them:
vodlockertv.com
biggboss.org
infoocode.com
newyorkpersonalinjuryattorneyblog.com
moringajuice.wordpress.com
surrogacymumbai.com
maximizedlivingdrlabrecque.com
radio.com
gossipcare.com
tecteem.comIf you're going to censor someone, you owe it to them to be honest about what you're doing to them.
(Even when doing the RightThing(TM) would probably be easier...)
And, BTW, I occasionally get blocked by the mechanisms here, even though not doing anything bad, but understand that there is a trade-off.
I suppose a sufficiently motivated spammer might incorporate that as a submission workflow check.