Bravenet's free photo albums contain ads, and at least one of them will try to install something, most likely adware, onto an unprotected Windows computer. The day before yesterday, I clicked on a regular, non-spammer person's Bravenet photo album page and I got 25 download notification windows for installer.exe files from http://ax.web-nexus.net.
From what I was able to determine from snooping around on the internet and reading the web-nexus.net description in Google, the executables were most likely adware.
I was using Firefox on a Macintosh, so these executables didn't download and infest my computer. I don't know the exact evil ad that somehow spawned them, but I did see this message in my browser status bar:
Transferring data from adserv.valuead.com…
Bravenet has a rotating stable of ads so not every free photo album visit will result in an adware assault. Just out of curiosity I hit reload over a dozen or so times before I finally got another slew of installer.exe download notification windows.
If you are a Windows user and visit Bravenet free photo albums, I would highly recommend using Firefox or setting Internet Explorer's security zone to the highest level.