Why the hell in the first place you will undergo a KYC to a site that's not even worthy to put some trust. Of course, to minimize the risks, only follow KYC procedures on a reputable site or those that are in the operation for a long already.
In most gambling sites, KYC is not a mandatory thing but it will just possibly ask depending on your account activity like in most cases when you won big or something fishy is happening on the site. Shouldn't be a bad idea to undergo KYC if we are talking about reputable sites.
Don't make things too much complicated.