Is it ok to let a site get off topic?

[Sgt_Kickaxe]

I like the Foo category here on webmasterworld. The fact it exists tells me it SHOULD be ok for my widgets site to have a foo category too. But is that a dangerous proposition?

Concerns
- An off topic post becomes wildly popular, links leading to the site have the wrong anchor texts and the site becomes known in non-widget circles. Too much of a good thing?

- Dilution of core topic. Even Google webmaster tools monitors what a site is about and returns those top keywords. By having a widet-free-foo section does the site rank a little lower for key terms?

Any thoughts appreciated.

[goodroi]

My philosophy is when in doubt to keep it simple and don't do anything that might confuse googlebot.

Of course the worst case scenario of adding a Foo section and having it become so popular that it impacts your anchor text is not really a terrible scenario. If that happens it means you probably doubled your traffic and backlinks at the expense of having a perfectly themed site. That doesn't sound like a bad trade.