Socialism is usually used as a pejorative term by those on the right, e.g, Obama is a socialist. Philosophically, I generally agree with the Libertarians. I would not be inclined at all to say the adding some regulations or holding Comcast, etc. is in any way socialism. The problem is that broadband providers are generally running a protected monopoly already, this is a form of corporate socialism already a.k.a. crony capitalism.
So, one problem is already a result of government interference in the market, resulting in Comcast, etc. having too much advantage over the consumer. Given that a broadband provider may well be a natural monopoly or oligarchy in many if not most marketplaces, some sort of regulation is probably needed in these markets as a free-market approach may not support enough competition or even with competition prices are still high as a result of duplication of infrastructure. A conservative approach would prefer the minimal government interference that still allows and encourages competition, but given the natural monopoly for an broadband provider, a municipal utility may well be the best solution.
So a well-informed economic conservative has not problem with this at all. Unfortunately many conservatives (and others) are not well-informed on any variety of topics, but this often does not prevent the expressing of a opinion, usually in conformance with a priori viewpoints on how things should work in the abstract.
Feel free to extrapolate that regulation, etc. is often needed with respect to other aspects of corporations. We will likely draw the line at different locations re: the best level of regulation. I would prefer these lines to be drawn based on evidence, and I believe it is very likely you share this view. Unfortunately for Comcast, etc. the current regulations seems clearly against the interest of the typical consumer as the US today.
Evidence is not always available, and corporations have a vested interest in pushing their interests via lobbying in various forms. I.e., policy making is hard. Facts are hard to obtain, they may change over time, and everybody has a vested interest in the decisions. I fail to see how condemning one side or the other is useful in actually discussing policy.