For all the talk about privacy and security, it seems that a lot of people are downright sloppy when it comes to who they provide personal information.

A couple of prime examples this week occurred where large numbers of unsuspecting or naive [people] happily handed over their usernames and passwords to a third party simply because the service looked cool.

First up was SocialMinder, which is offering a service that lets you get control of your Gmail and LinkedIn contacts. To use it, you have to hand over usernames and passwords to an unknown company offering a beta service. Even worse, SocialMinder is using the information to spam your contacts, unless you realize what they are trying to do, and opt out.

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In the wake of Microsoft’s aborted courtship of Yahoo and Jerry “Oh, did you increase your offer?” Yang, there’s bound to be a lot of scrutiny about what’s next for Yahoo.

One asset that’s well known but perhaps not scrutinized from an investment perspective is Flickr, the world’s most popular photo-sharing site that Yahoo picked up for a song (estimated $40 million) in 2005. Today, Flickr attracts more than 44 million unique visitors a month, according to Comscore, while Compete.com reports Flickr had 30 million unique visitors and 70.2 million page views in the U.S. last month.

Despite Flickr’s popularity, it is arguably under-monetized. In terms of advertising, it’s minimal at best. Instead, Flickr makes most of its money by selling Flickr Pro memberships for $24.95/year and offers e-commerce services through partners such as photocards, posters, frames and calendars.

So, what’s Flickr worth, and, more important, what could it be worth if it was managed more aggressively?

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