I used to run my blog on Wordpress and hosted my site at Dreamhost (I would recommend Dreamhost without reservation, BTW). But I found I was spending lots of time doing updates and I really don't have time for that. I also frequently noticed that my posts would get spam inserted into them to manipulate search engines via SQL injection hacks. Annoying.
So I closed up my Wordpress install over there and came to Blogger (who I can bitch about, but they're free). I've also used Google Webmaster Tools (also free) and I have used the webmaster tools since back in the Wordpress days. I liked Wordpress, it was fun. Learned some CSS skills. I liked Gallery for sharing images too (but now I use Picasa).
Anyway, upon setting up my blog on blogger, I noticed that my traffic logs had some strange guests (Ukraine and Russia? see below - click to zoom):
Weird, right? So doing some digging I checked the webmaster tools site for evidence of stupidity and there it was under my crawl errors (again, click to zoom):
Some script kiddie website had figured out a way to insert their serialz in my Gallery. WTF?
I love free software, I've licensed stuff under the GPL that I've written. The problems are: difficulty of necessary upgrades being performed regularly by casual users and the lack of commercial impetus to make a proper product.
I'm sticking with big names and commercial software for the foreseeable future.