So can devs answer me, please? I must to provide docs (which ones) or no? I mean do the KYC?
Yes, you will need to do the KYC. There will be a "How To - KYC" guide released today in a couple of hours, so you can read all about it there. But you will need your ID, adress, etc.
Ok, thank you. Why you need adress? I understand passport andname. But I want not give my adress

The government will penetrate crypto world with its sneaky policy, first KYC then next regulation. Gone are the good old days where crypto was all about anonymousity and decentralization. Now more centralize nodes are poping up. Ripple etc
But not all projects want to know adress. This is not safe I think. At last in a lot of poor countries. Someone can know my adress and...

this is not good.
KYC for some people isn't good thing to do. They are afraid if the data will be accessed by bad people.
Yes, many people I know avoid KYC and buy after the coins are at the exchange now.
Thats a problem for some projects, which maybe dont reach their softcap.
KYC has become a usual procedure for serious ICOs and even with KYC many ICOs were successful. I think when projects don't reach their softcap it's got to do with the current market situation and/or the quality of the project.
Unfortunately, with regulatory pressures, many projects are currently worrying about the future, having control over who buys and how much to buy makes it possible to make future installments of future accounts, I hope they will not happen, but everyone wants to be cautious.