Most of the micro coil crowd are using them on regulated devices and they are built in the 1.5 - 2+ ohm range. It is the protected circuits in the regulated mods that make them generally safer since they have built in short protection and limits on the amount of power that can be drawn from the batteries.
The bolded is important for people to understand, and I think it really gets overlooked so that people can make a point. That point is usually rooted in something good, safety, but it gets frustrating when things get lumped into one category wrongfully.
From my understanding, microcoils were a way to get sub ohm performance out of a higher ohm coil. Some people take the resistance lower, and as long as they are doing it safely and advising other to do it safely then I don't see why others get so worked up about it. The converse is also true, those who are going about their setups unsafely or recommending an unsafe or extremely advanced setup to people with little knowledge about the how's and whys should be called on it.