1. I think it’s likely that Tumblr “safe mode” blocking teen-friendly LGBT content is a poorly chosen/implemented filtering system, and not deliberate censorship.
2. I also think it’s inexcusable for @staff to not immediately respond when people are pointing this out. A fix may take time to implement, but a post saying “we hear you, we didn’t want this, and we’re working on it” would be easy enough to make.
3. Making “safe mode” mandatory for users under 18 was a really, really bad idea. If they wanted to introduce it as an optional experimental feature, then whatever, it’s only mildly offensive. But rolling out their broken-at-best filter as mandatory because “think of the children!” was just a horrible idea.