There are thousands of little blocks installed and removed daily. Often it is an automatic response to suspicious traffic or a notice and is removed before any human really notices. Such things are only a violation of net neutrality if done in bad faith to block specific content. Or if the block persists beyond the need. Your home router is probably blocking some inbound traffic right now without you noticing. That's what firewalls do. Without active blocking of evil or poorly-configured networks the internet would be much less safe/fast/enjoyable than it is.