If an ICO wants to go more legit within the existing world and comply with certain authorities, you most certainly need to do a kyc. If you want to reach traditional investors, this is the way to go also to be tradable on upcoming security token exchanges such as Polymath GBX or tZERO. I think the development of blockchain goes quicker in finding a way between evolution and revolution, implement it in the existing world and get a bit away from the thoughts of max disruption.
Anonymity was most probably one of the core ideas of the bitcoin network, but chaos was maybe not. Imo a system needs to operate in a somehow regulated framework, there should not be any profiting third party though. I further understand the privacy concerns and fear of data abuse. This again, i think will clearly be a part of the future technology dominant world, and we need to have kind of a digital identity. Therefore, data and IT security have a huge relevance within this area where it's all about trust.
It's probably not that they 'want' to go legit but are now being forced to because not doing so is illegal. Lets be honest, it was only a matter of time before the authorities started clamping down on the wild wild west that the ICO market has become. It's basically a free for all for scammers and they've certainly been taking advantage of it.