Sounds like a recipe for madness! The first time you are killed by a poison dart from off screen that a skeleton set off...

We will have to actually fear the blood moon... actually dig pits to protect ourselves... and have one person mine while another fights off intruders.... I am for it!
Another thing to note is that in the next release there will be options for creating other-dimensional or hostile worlds (not sure on details yet.)
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I set up a new medium sized world at port 7778. It is using the newest version of the tshock server (V. 3.4.5.0106) so I can run it on linux. They supposedly have
most of the bugs worked out now. Hopefully there will be no armor stand corruption and random teleporting into the ground. Let me know if there are any bugs and I will move it back to the official server on windows.
- It will not let you connect with anything but a hardcore character (or it shouldn't)
- Server side inventory is enabled (for extra hardcoreedness) It will freak out if you try and bring any items in you did not get from the server (no logging into your other world to grab some armor, the server will throw a fit)
!!! IMPORTANT !!!! Think of a password and then use the command "/register yourpassword" and then "/login yourpassword" to play.
The server wont let you move until you have registered and the logged in. So far it seems to remember your IP, so you only have to do this when playing from a new IP after the first time. And you only have to /register once ever (I hope).
If this gets too annoying I will disable the server side inventory. Or if for any reason anyone does not like it. I am kinda unsure about it as it just seems like extra overhead. It was created to stop people from public pvp servers from cheating. But I don't really care in out case. I trust you all not to grief each other 
It was, in fact, too annoying and is now disabled. Also we are running the official server again as the tshock one is still too buggy.
- Use a hardcore name! It's fun and campy! Examples are Crash Nighfall or Chuck Grinder! I'm sure you can think of better though.
- Spawn protection is on because the 3rd-partry (tshock) server seems to like putting in the ground under the spawn without it. I will try reducing the number of blocks around spawn to make it less annoying (its nice to spawn in a shelter)
Other game-play styles we might try are only allowing one bed and playing medium-core (so you always have to spawn back at the start but don't have to create a new character) this would add more of the extra difficulty that hardcore does with a little less of the tediousness.