A lot of people have read this question to mean the accurate scientific implications of everyday superpowers which isn't really in the spirit of superpowers. I'll try to say powers that feel generally altruistic or built for cute characters that have cruel implications.

Healing us the classic cute superpower, but if the user of the power chooses to overheal somebody they could probably cause basically mega cancer.

It's pretty easy to imagine the the implications of controlling animals, and it's a pretty good power to sit in the background as a utility power until the user decides to have every insect, rat and pigeon in the city bombard somebody.

The ability to share memories is hard to be used villainously but two fucked applications would be to beam somebody's traumatic experience I to somebody else's head (or an experience that happened to one person that could trigger someone else's PTSD), or if the user has trained themselves to be able to alter their memories to fictional events on demand, turning what is basically a truth finding superpower into an abuse of perceived honesty.

Finally the superpower of using Reddit and Lemmy your whole life and generating a very standard way if responding but having the cruel and unusual twist of always sounding like fucking ChatGPT.