I think a lot of tumblr users don’t understand that it gets really hard to control or even be aware of who interacts with your posts after you have a certain amount of followers. I don’t even have THAT many but after I hit like, 3K, it became a lot more difficult because the mute function on posts doesn’t work AT ALL, if you have even one popular post it will flood your notifications unless you delete it. If you have multiple posts with 10k+ notes and don’t delete them, checking notes is honestly a nightmare lol. I tend to delete posts that get popular for that reason, especially if people are adding lots of commentary. All this is to say that you see someone shady reblogging from a popular user, it’s best to message them about it in some way before assuming they just don’t care