Improper Users

For some reason we have a slew of users which are in the format
user1;user2;user3;user4. These users are labeled as “Autocreated when added as
a watcher” Presumably, either when someone was creating a ticket directly in RT
or forwarding an email to RT in order to automate the creation, these users were
inserted into the one of the email-recipient fields. Doing so, again
presumably, didn’t parse the list in order to check the existence of the users
and instead, viewed it as a single entity which didn’t already exist.

Is it possible to eliminate this behaviour or do I need to simply stay on top of
them by manually searching for and removing them?

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