Maybe because I don’t use Lemmy at real bot hours, I haven’t seen them. Maybe see a spam bot every other day.
I also tend to sort by top 6 hours or top 12 hours so a lot of low effort content gets filtered out.
I also don’t consider people who make off the wall comments or hold opinions I disagree with or think are uniformed or stupid as trolls.
The other thing is that I comment with the philosophy that not every comment signifies a response and so if a reply is a troll or in bad faith, I just keep scrolling.