Apparent bots

[Shirai]

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.

[BreathlessTao]

When SE bans accounts they do not delete the characters attached to those accounts.

Any particular reason for that, I wonder? Because it doesn't sound like it makes a lot of sense... They happily cite server issues when asked about, for example, inventory expansion, but then they continue to store characters of perma-banned accounts? Sounds kinda illogical to me?

[Shirai]

Any particular reason for that, I wonder? Because it doesn't sound like it makes a lot of sense... They happily cite server issues when asked about, for example, inventory expansion, but then they continue to store characters of perma-banned accounts? Sounds kinda illogical to me?

By deleting those accounts or characters they also delete data they might need in the future in case a SE wants to pursue legal charges against a company/party, or vice versa.

As a side effect, they can't make new characters with that name to harass you with. Making it safe to remove them from the list forever.

Apart from that, character data is merely that, game data.
And data isn't the issue when they talk about the issues you mention, it's server load, the traffic that takes place between the client (you) and the servers.