What country are you in? A big part to the response is country. I have only had to scan in an ID once and that was to withdraw funds from a chinese exchange following an ICO. I use a ton of exchanges and never gave out any info other than name and email. And if you want to be very cautious, use a fake name. Yes, poloniex, kraken, etc will allow you to withdraw more than $2000 USD a day if you have an ID and SS# on file but I prefer not having people all up in my business so I don't give them everything and never been an issue.
i have tried to bypass the ss and identity and i have yet to be allowed to proceed, so if that is the case then one of the pillars of crypto is already crumbling.