Greetings, I am interested in joining Sintember. Whenever I write stories currently, it's filth porn for myself. I will probably not be doing that for Sintember. Point is, I don't really post any of my more taboo writings online. Do you perhaps know what kind of stuff I can get away with posting on Tumblr, and which kind of stuff I'd need to post elsewhere, and if so where? Thanks in advance.
We're delighted to hear your interest in joining our indulgence!
Tumblr as a site tends to have alot more issue with images then written content, and from experience you are highly unlikely to have any issues with content as long as it's not mass reported. So possibly consider the risk of maintagging a work, if you are writing for a particularly hostile fandom.
For sites elsewhere, if it is fanfiction which you are seeking to contribute, then A03 is the perfect site. We even have a collection there, where you can find all sintember stories, from all years!
As for original fiction, that one's a bit more complicated. You may either create a Wordpress account, or your own site to host it, as to best avoid censorship from parent companies, or harassment from fellow site-users.
Hope this was helpful, we are eager to see your contributions!