Can bots be illegal?

I understand that the use of bots in various fields, including cryptocurrency and finance, has been a topic of much debate. So, I must ask, can bots actually be illegal? Are there specific circumstances or actions that bots engage in that could potentially land their users in legal hot water? And if so, what kind of legal consequences might they face? It's important to have a clear understanding of these issues as the use of bots becomes more widespread in our digital age.