Permissions seems to be a BIG gray area. I have read that article above by that app developer it helps to break down what all the permissions mean but it's still gray for me.
But....if you read that article it says Permissions is really important and if you did all the things it says about being careful with those permissions, you would not be downloading most of the apps today. They almost all ask for Full Internet Access and alot of the others ones as well. The article says it's not always good to allow this stuff, so it's a catch 22.
I agree though..more talk needs to be made aware of how important this stuff is or isn't. That app developer who wrote that article should do a follow-up on just about Permissions, he sorta gave us the basics and didn't elaborate enough on the permissions aspect.
I would say 90% of the people that download apps don't even know what all the permissions mean or what they can do, they just want the apps, at any cost???
How important are these permissions? Yes we need a article just on this topic that is stickied at the top so we ALL can understand. Because people don't understand it causes ALOT of the negative reviews on apps. So it affects the whole process.
If you want more elaboration on the permissions, feel free to donate on my website (there is a button just for that security guide -- though I'm not sure if it works, haven't yet received a donation)
Anyways, the main themes I was trying to point people towards were:
1) That the community is your anti-virus
2) That people need to use judgement and be dilligent themselves
3) That the context and combination of permissions is important
If you're unsure about a permission, come to AF and ask about it (and give the app name). If you're unsure about an app, come to AF (or whatever your preferred Android enthusiast forum is) and ask abou it.
There's a good number of people who are willing to try out apps first, so you don't have to be in the early adopter crowd unless you want to, and feel very comfortable that you understand Android security.
judge_droid is correct though, and I fully expect to see the Telephony permission split at some point.
The SD card probably will not however (in my guestimation), because disk access is just something nearly all apps are likely to want/request. It's also something most other computing platforms always grant for their software. (Think about Windows/Mac). I think this is partially why that permission has been made "invisibly" backwards compatible for apps that specify 1.5 as the API level.