Some BA Captains seem to overdo the PA's on the ground. I remember a lovely incident a few years ago at LHR when a BA Captain blocked the ground frequency for about five minutes, thanking his pax for travelling with them from BRU as it was a very competitive route etc, etc, etc. While doing so he (or the FO) went through a red light and incurred the wrath of the Ground Controller for that as well as the frequency-hogging!