This thread will likely be nuked as "player shaming" is not allowed on these forums, even when it's apparent that they are bots.

Now as to a little explanation why these seem to take longer to be banned:

Bots like these are usually part of a farming group/cluster, the taskforce "leaves these be" for a while to see how many characters (sellers, farmers, banks and buyers) can be linked so that they can take out a whole bunch in one fell swoop.

As for your blacklist problem, it is safe to delete any entry older than a week, probably after a day too.
When SE bans accounts they do not delete the characters attached to those accounts.