Some of them even have the Regular and Leader role despite not even having 1 minute of read time. If you have a 15 years old account and ask for it to be merged, will they keep the roles?
doubt they keep the roles, badges = /shrug I guess?
It looks like those accounts were either tests or part of a failed attempt since they’re all named anon with a bunch of digits and don’t have a lot of posts. I wouldn’t worry too much about it.
As for merging, I think they just edit the posts so that you’re the OP and delete the zombie account so badges wouldn’t carry over.