If I want to participate in crowd sale event should I pass through KYC procedure for buying these tokens? I would like to understand this for myself.
To buy KSC tokens it is not necessary to pass account verification. However, if you intend to participate in the airdrop campaign, then you will be provided with full information, including copies of your passport. You will find full information here
https://medium.com/@KStarCoin/200-kstarcoin-ksc-airdrop-event-on-latoken-666dea796049