kavazovangel: Stick with Adobe Reader... in the new versions, Enhanced Security is enabled by default, and, you can always disable JavaScript for additional security (although this will cause problems with PDFs that pull content from the web).
I personally prefer Sumatra PDF, but Adobe has really cleaned up Acrobat in recent years.
That being said, whomever it was that decided to include the scripting functionality into a document format ought to be beaten severely with a bag of old AOL disks.
the_bard: You don't have to install it if you don't want to. It's just there if you need it.
The problem is that few people need it and yet it's in every single set up you download from GOG. And that does add up over time. I'm sure for most people it isn't a large amount, but for me it's probably a few hundred megabytes of download and storage that I don't need.
Honestly, I don't really care that much, but it's not something that serves any particular purpose for most customers.