We should really be prepared for that but for now people could still able to enjoy to have those unverified account benefits in some popular platform where you do have some sufficient limits
There is always a risk of having to complete KYC (or complete additional KYC) on any centralized exchange, even the ones which allow non KYC accounts up to a certain limit. If they decide you are trading too much, or they don't like a pattern of trades you make, or they don't like where your deposits are coming from, or they don't like where your withdrawals are going, or any number of other undisclosed reasons, then your account can be frozen and KYC demanded. If you don't want to complete KYC, then you can wave goodbye to your coins. The only way to be sure of avoiding KYC is to avoid the centralized exchanges which demand it.
It amazes me with what impudence Bitstamp extort the personal data that I have already provided them at KYC verification.
Data is a valuable commodity. Just look at how many billions of dollars Facebook have made by selling individuals' information. The worrying thing is how Bitstamp are permitted to share/sell your data with pretty much anyone they like:
We may share Personal Data with third parties to help us with our marketing and promotional projects, or sending marketing communications.
We may also share your information with certain contractors or Service providers. They may process your Personal Data for us, for example, if we use a marketing agency. Other recipients/Service providers include advertising agencies, IT specialists, database providers, backup and disaster recovery specialists, email providers or outsourced call centres.