For the uniformed, over the previous week there have been sock accounts that have indeed been posting shock images of irl gore of a variety of subjects in the tags. Even if that doesn't make you personally squeamish, the clear intent is to expose people to it to potentially trigger / traumatize them. The tags they're spamming with these images range from 'oc rp' to outright '(fandom) rp'. While other blogs have been informing people of these accounts to block, and thankfully tumblr staff appears to be taking the blogs down within a 24 hour timespan, the fact that as of writing this person (or a copycat) is on their third blog and probably won't stop. And if they do, it might just be for a short period of time to get people's guards down.
The best way to avoid this is, for the time being, stop browsing rp tags for a while and try to stick with the dashboard. On top of that, while I imagine it is tempting to commentate on these situations, outside of telling people the new URL to block, simply try to continue to use your blog as normal. Don't feed the troll, especially when this is a blatant case of using 'shock images' to elicit a reaction out of a niche community. The 'person' will get bored or realize that their blogs will continue to get banned eventually.
PS. If you're concerned that you may get stuff sent directly to you, remind yourself of tumblr's safety features and how if a non-mutual tries to send you an image, it will be blurred out. You are safe as long as you stay out of the tags and avoid the 'for you' page (I'd recommend blacklisting popular rp tags if you feel exceptionally antsy about this situation).