How important is quality control for UGC?

[nicole.healthline]

In this post, http://www.seomoz.org/blog/ugc-gets-an-a-on-google-test-with-panda-update-12260, it mentions that UGC content performed well after the Panda.

One of Google's 23 questions mentions spelling errors. I am wondering how important it is to ensure there aren't any spelling errors or grammar errors in UGC content post-panda?

[EGOL]

I think that the bigger threat with UGC is that they will fill your site with spammy links.

[JamesNorquay]

The best type of user generated content is where you make users much place a specific amount into the form.

It could be to win a price or something to emphasize the users to input the amount of content. Because if you have thin content which is spammy and the same all over the web it will not do much for ranks.

I don't really think spelling errors are a big issue, that falls more down into usability, if you are a big brand and you have spelling errors all over your website it will not look professional.But from a UGC point of view I would not worry too much.