Yeah, true - filling out the whole user profile is helpful, but the fact that your location is displayed under your nick helps a great deal for those "hi, I'm looking for $30 headphones, what should I get?" questions.
Is that $30US? $30AU ? you're in the UK but quoting $US?
The reason is that different countries get seriously different prices on headphones, the Sony V6/7506 is cheap in the US, but it's not in Australia (coming in at around $110US) so recommending them isn't always a good idea.
When it comes to Beyer and Sennheiser, Beyers are quite cheap here in Australia, but Sennheisers are insanely overpriced - so while it's a good idea now and then to recommend a certain model Sennheiser to someone, they might be better off ordering it from overseas.
eg: best price you'll find the HD600s for here is around $350US whereas the Beyer DT931 is around $190US
HP890s being another great example etc