I just opened my MM wallet and noticed 1 token ACR was added. Should I be concerned?
Probably it’s scam token
how can they add it too my MM? can they take any of my crypto?
Treat it as spam and don’t import unknown tokens into your wallet.
is there a way to block it or delete it
No, do not interact with it, this way you’re not signing any permissions. Leave it alone, this is also common with NFTs too.