Email: I don't send unsolicited mail. I can barely keep up with legitimate correspondence as it is. But there are a lot of folks out there that have nothing better to do than harvest addresses and fake messages to look like they come from someone else. This is admittedly more likely to be a problem for big e-commerce sites than for the likes of me, but it could happen that someone spams you using my address, despite the fact that I take steps so that it isn't just simple obvious fodder for spam-o-bots.
Cookies and Tracking: I have removed the Facebook, Google+ and AddThis buttons that used to be on my site after I learned that these widgets were tracking my visitors without their knowledge or consent even if they did not click them.
The only tracking left on the site is Google Analytics. I use the reports several times a year to understand what's been happening with my site traffic, downloads, etc. I take this info into consideration when thinking about what music and other content to offer on my site and blog. I don't share the information with anyone except my cats (and they are mostly asleep while I'm talking). I assume Google is also using the info somehow but I don't know exactly how. They claim that no personal information on my visitors is collected or transmitted and for the moment I believe them.
Here's where you can read what Google says and also get hold of some tools to stop Google and others from tracking your web browsing activity in order to make money.
Do Not Track + Results for this site
"Money for nothin' and your chicks for free" — Dire Straits