Self-deleting downvote bots, post bots

Accounts are being created on lemmy.world, downvoting en mass, and then deleting themselves. (See this example, https://lemvotes.org/user/iuyfihefoqerhif@lemmy.world - 99 downvotes in 7 minutes.)

Accounts are also being created, then flooding communities with posts, then also deleting themselves. A few examples below:

https://lemmy.world/u/delasnuz https://lemmy.world/u/lord_alkriey https://lemmy.world/u/ivan_kor https://lemmy.world/u/aberidiena https://lemmy.world/u/Shandrade https://lemmy.world/u/lawrence3 https://lemmy.world/u/luciana https://lemmy.world/u/jarleney https://lemmy.world/u/magentaz https://lemmy.world/u/cannedtuna_ https://lemmy.world/u/cohen_drz https://lemmy.world/u/aidenn5 https://lemmy.world/u/landsteri https://lemmy.world/u/iris_n_eye https://sh.itjust.works/u/solace4do https://lemmy.world/u/Forzzza \

Are the admins aware of this behavior? If so, is anything being done to remediate this issue?