As far as license violations are concerned, this is not a problem solely limited to the BSD as there are oh so many cases for the GPL as well for example.
In my experience, I'm much more keen to include a notice about the folk who wrote that piece of software than complying with the GPL (although I always do). For example, let's say you want to strip down an ERP web-client so that mobile devices can actually use it. That's a quick and dirty 1 hour patch to render the software minimal. If the software is under the GPL, you must publish your changes. Knowing that your dirty patch will be obsolete in a 2 weeks time and that nobody will ever actually look for it.
Well, I'm all for freedom.