You create a new user to repost that users content from reddit? This is absolutely ridiculous. You make it so we can't block your spam by blocking the bot user if you create a new user for every post.
Sadly, unless you use lemmy via one of the apps that can filter instances, this bot is annoying as fuck since you can't just block the bot itself. It posts using bot generated user names.
Luckily, there are apps that filter instances, so there's that on mobile as an option. Otherwise, that kind of bullshit bot would make lemmy unusable.