wilderness - 10:52 pm on Jan 19, 2013 (gmt 0)

It is easy enough to block and individual IP or a malformed UA that you find doing things you don't want them to do but what do you do with IPs inside AT&T or Verizon that use a common vanilla agent?

The standard browser assignment for a new customer seems to be IE, however these days folks are using a variety of browsers and versions.

I am blocking individual IPs, I just don't think that is a very reliable defense when I see my own IP change daily and even in the same day.

Assignments (at least broadband) are dynamic by nature,
See below.

Do most Communications ISP clients have unique static IPs?

My broadband IP assignment (US) is dynamic, however mine has not changed in months, and for the most part (with the exceptions of short periods, has been the same IP for more than two years. And despite turning my computer off nightly. I rarely reset my broadband router, unless theres an issue.
I've seen similar with longtime widget correspondents with other US Broadband providers.

My biggest problems are with the mobile devices.
Both browsers and IP's.
The browsers are vanilla agents.
The IP's may change on the next connection and/or place of origin, while all the while being the same person and/or device.