If you can actually only see the fics through registering, it's much more private than dA where every man and his dog can see just about everything there without making an account. Therefore, it's best not to use fics from that site, whereas fics on dA are completely open to the public eye.

I'd agree that it's better to not do missions from there, especially if the M-rated stuff is what's being charged. I think it's said below here, it falls under Your Kink Is Not My Kink, and so on. But I think MSTs, unless they're specifically PPC MSTs, are more just using your best judgment. I still wouldn't advise it, just because it is, so to speak, behind a locked door. But a lot of places do sporkings - I think it's your call.

What sort of problems are there other than "bad dialogue"? Because that sounds more like a problem for concrit than anything else. Like, are there any major canon breaches, or things of that nature?

Alternatively, I'd be happy to take a look at the fic and give you my opinion if you want to email me a link to it.

I still wouldn't do it, even if you've done it before. The point is not 'rules' about it, but fetish material. Nobody wants to hear about anybody make fun of fetish material, written by people who know what they're going on about and post it anyway. I kinda feel that sporkings and even MSTs are more about badfic, not gross fic.

Your opinion may differ, but as somebody who has seen it all on the internet I can safely say I don't really find mindful fetish material, no matter how poorly it's written, that funny. At all.

I think I made a post about this earlier today,

http://disc.yourwebapps.com/discussion.cgi?disc=199610;article=209673;title=PPC%20Posting%20Board