Turning off Text Decoration for Links, Bad for SEO?

If there is one thing that stuck in my head at the Pubcon is the conversation about turning Text Decoration off. Basically this make a link not look like a link and it looks like normal text. Usually this is done for style purposes, I never thought about it as a SEO hindrance. I am wondering if anyone has had a similar experience with this.

Especially since so many use this.