While the majority of comments so far seem to presume the condo association wants to run their own ISP, there is no reason in most of the United States that they have to do so.
Just like your condo association should be able to get "bulk cable", satellite, or Uverse/FIOS/IPTV service, you can purchase bulk Internet in a similar manner. You can even combined bulk TV, Internet, and/or phone service if you want. Even satellite companies have partners who can take care of Internet service nowadays, or can use Ethernet themselves to distribute TV service to the building.
This offloads all the DMCA, etc. work to the service provider, although there are a few catches. The first is that you are paying for service to all units; if a unit owner does not pay their dues, state laws may prohibit you from cutting off service (and even if you could your contract still might require you to pay for it). The second is that most providers currently hooked to your building presume not everyone in your building is using their service; you will need to make sure they provide you enough bandwidth to cover the increased subscription rate.
The third item is that these tend to be long-term contracts; the longer you commit to, the better the potential discount tends to be. However these contracts also include clauses allowing automatic increases in rates.
I looked into this once for a condo association myself; and while a local survey suggested owners wanted such bulk contracts, when confronted with the financial costs (and our rate of non-payment) they tended not to.