If you have ever been personally involved with, or defended in any way:
asexuality or aromanticism
power-related kinks such as D/s, CNC, incest roleplay, CG/l, or babyfur
fiction or art that depicts characters under 18 nude or engaged in sexual activity, in any context
actual people under 18 engaged in sexual activity, in any context
physically or sexually violent intrusive thoughts
And:
you’ve posted or reblogged any drawn obscene material that depicts a person or people of any age and appearance
You can expect to get mass reported under this category. This is already happening (under the “child sexual abuse images” category), but it’s distinctly possible that Tumblr’s tacit endorsement of it will escalate it further in the near future, and particularly, that a law-and-order mentality will weaken the divide between the mob and ordinary people who don’t want to be involved.