Chat Verification Criteria should also prevent users from following
Regarding chat verification, it is good that you can set it to email/phone verification if an account is newer than a certain period of time, however I have confirmed that while this prevents an account from chatting, this does not prevent an account from following a channel without verifying.
In the past I have been harassed by people (and seen people harassed) by users who never said a word in chat. Their method of harassment would be to create an account with revealing information about the streamer and simply hit follow. They would be banned, however the account would be deactivated shortly after and a new one created in its place where the process would be repeated, infinitely if a VPN is utilized. Most streamers use some kind of notification system, either in chat or on the screen (or both), some have events lists that keep the information on stream.
The way that the current verification system works does not protect streamers from this very insiduous method of harassment. Please make it so verification methods also extend to follows. I do not want people following me if their account is less than a week old (unless they can verify via their phone)
As a side suggestion, please also make it so users can submit suggestions and feedback anonymously. Most streamers method of dealing with harassers is to ignore them, however they risk being brigaded, or seen to be susceptible to harassment if they raise it here.

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Valadroit commented
This idea's purpose is to combat user harassment. I would like to see the ability for a streamer to set restrictions on user's that can follow their channel. Similar to chat verification settings, like email verification, account age, phone verification, etc. A streamer should be able to set a level of requirements before an account can follow their channel.
A follow often triggers events like, an automated message in chat or an alert on stream. These events are a great way to engage with new people and let the community see new members. BUT when hateful users continually create new accounts and follow, it forces streamers to disable these features. When these accounts are inevitably banned, third-party clients and/or extensions will often show chat the username that was banned. This often results in a streamer having private information leaked in their chat through the username, such as addresses, phone numbers, etc.
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Netheri77 commented
This heavily.
There's now a trend that there's multiple TOS nicknames following channels I follow (and moderate some of them). Also, these TOS names are left as latest follower on the screen graphics if there's one for followers and/or for other all user interactions. This especially is becoming trend now when the summer holidays from schools begin...