*sigh*
EDIT: While I appreciate the annoyance of football to most Australians on this forum, and most Australians in general, it is the biggest sport in the world. I think that the English Premier League is the most widely broadcast/most watched event/show/thing, ever. Still, we cram in most other footballing competitions (Champions League for example, where the Barcelona vs Chelsea game was the most talked about thing on Twitter, ever, I think) and news in the English thread as it is.
The polls help clearly illustrate the choices of forum members, and the responses so far indicate a mass interest, at a pivotal point in the league. The polls are also only open for three days, so that they don't have a lasting irritation factor for people like yourself. I did create similar, if not a larger amount of polls last season. I've also created them for cricket related subjects, and I see other members doing so now.
When they're in the relevant sub-forum, I don't really see the problem. I certainly don't mind if there are three AFL/League/Rugby polls at once, especially if there is a 'market' for them.