Banking red flags? How much $$$ will trigger a flag?

[tedtodd]

I'm about to withdraw $10,000 from a poker site, and I'm wondering whether I should do it in smaller chunks to avoid red flags?

I've been a bit liberal with some business tax write-offs, so I'd really like to avoid anything that may trigger an audit. They're legit, but there's some gray area that I'd rather not have to go through.

So what's considered 'suspicious activity'?