I think the whole point of ICO's is that you can just participate in them via Ethereum without any third parties at all - this makes investing available to broader audiences. When governments will start regulating ICO's, they would become no different from IPO's and there will be many obstacles for potential investors. So, for ICO's it would mean that we'll see drastic reduction of new projects, while some ICO's will choose to operate regardless of their legal status.
I cannot look at it as a problem, ICOs in the first place are at an advantage compared to IPOs of a company, you know before they can even have an IPO they would be needed to be represented by a bank to manage their application and would need to have a certain amount of market cap in order to belong to a proper market from small emerging market to the big blue chips one chances are you might not even belong to any market group in the first place. While ICOs even under ER20 tokens don't need to go to that rigorous process, what they only need to do is to launch various campaigns in order to market/sell their token's ICO.
As a developer of a token of course this would mean more time and money spent before I can even launch and promote my Token. But as an investor I would definitely want some kind of regulation involve in order to protect my money, and I think investors are the ones who needs to be protected in here as they are the ones who will be providing more money. Knowing that this ICOs won't be running away with my money easily can give me a peace of mind, I can even invest more money now knowing some regulation is taking place.