Any text regions matched by items in this list will never trigger a Highlight (or, for the Ignore Blacklist, will never cause a message to be ignored).
For example if the Highlight list contains kerbo, it would highlight the message
"Welcome :) kerboHowdy", however if kerboHowdy was blacklisted it would
prevent that Highlight. If instead Welcome was blacklisted, it would not prevent that
Highlight.
Blacklist entries having only non-main text matches such as +start:!clip or
non-text matches such as cat:vip will prevent matches on the entire text region,
so +text:Welcome would prevent the above match.
Adding the config:block prefix will prevent Highlights altogether, if the blacklist entry matches.
For example if config:block Welcome was blacklisted, it would prevent all Highlights of messages that contain "Welcome",
even non-text matches.