At least not from the gambling website's end, because if KYC documents have been provided, they need not to harass their customers like this. I'm personally a fan (yes I'm still am) of sportsbet.io but the number of complains being raised on a daily basis have rung alarms in my heart for them.
Asking for KYC is not harassment. Harassment is when you ask for KYC then bring up the ToS, accuse that it's multi-account, do not show any proof of multi-accounting from the KYC reference, then you lock the account, then a user is going through all this public forum things and is taking heat (scammers etc) just because it's a newbie account.
That's harassment.