They do it all the time. They write elaborate rape threats towards "transphobes" 24/7. Just look at the "Rowling Derangement Syndrome" thread or any of the tranny megathreads. They will write paragraph Tumblr posts fantasizing about "TERFbreaking", which is a fetish for raping "TERFs" and then converting them to being tranny worshippers. (I don't care enough to make a Tumblr account just to look it up for screenshots, but if you want to, just go on Tumblr and search "terfbreaking" and I'm sure you'll find plenty of these posts.)
Edit: Tumblr let me scroll thru a few posts in the "terfbreaking" tag before a pop-up appeared asking me to sign up. Here's one of them:
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It's basically the "buckbreaking" meme but replace blacks being "broken in", with "transphobic" women instead. Apparently, they also have their own version of "BNWO" ("Black New World Order") since this post also has the tag "Trans New World Order". MTFs will send Tumblr "asks" to each other fantasizing about how they want to rape TERFs.