Lack of interest Allow multiple user names to be listed under user criteria section of contact user pages (alert users, email users, message users)

[Feanor]

Alert users / Email users / Message users -> User criteria -> User name. It seems strange that we can't list multiple users here. For example, notices allow you to add multiple user names separated by commas under user criteria. However, these three pages only allow one name to be specified, despite the rest of the page allowing the selection of fields, groups, etc. that apply to multiple users.