Just writing to support this suggestion, since you think people not speaking up means they don’t want it. Personally, I usually search for what I need and give up or find an alternate if I can’t figure it out on my own. Generally too lazy to ask – others are probably like me.
I currently post Addthis HTML buttons to the bottom of every post I make where I want to use it instead of using the plugin because I can’t turn it off for specific categories. This messes up my RSS feed also. Even if turning Addthis on/off for categories isn’t possible, I would at least like the ability to turn it on/off for each individual post at the user interface.
The reason I need this feature is because the majority of my posts are image galleries with a particular look that the Addthis buttons interfere with. I only want the plugin to be active on my news blog posts. I’m sure someone with more knowledge than me could hack this, but I, like many users, am not a coder so we really need user interface options to control the plugin.