Speak for yourself. This is just the semantic web: a web not built just for humans, but also for robots or any other types of agents that may wish to build upon the data. User agents never meant just web browsers, and operators blocking based on it necessitated hiding your identity.

Blocking bots is an absurd and unwinnable proposition, just like DRM; there's always the final, nuclear option of the analog hole, a literal video camera pointed at a monitor and using a keyboard and mouse.

If you really need to, deploy a proof of work shield that doesn't discriminate against user agents, just like what Onionsites do.