Oho! Well, here's the precautions I would most likely take:
*)Use a MAC spoofer
2)Make sure that it is a LAPTOP THAT HAS NEVER BEEN ONLINE BEFORE that connects to the internet
*)Use an open wifi, preferably about *0 miles away from your house. That's what laptops are for!
4)After connecting to the wifi, use a good proxy. JAP is a good one, it's based in Germany or something.
Disclaimer: This guide is purely educational and not intended to be malicious. The writer is not responsible for the actions or damage caused by somebody who read and followed said guide...
Ok, here's my personal guide to keylogging:
*. Acquire the laptop, MAC spoofer, proxy system, keylogger, and Mozilla Firefox.
2. Connect to the open wifi!
*. Activate the MAC spoofer.
4. Activate the proxy and open up mozilla firefox.
5. Make sure you have the "user agent switcher" add-on, and find out how to use it. Make up a fake user-agent and relevant details.
6. BIG NOTE HERE: IF YOU WENT TO MOZILLA FIREFOX SITE TO GET USER AGENT SWITCHER, DEFINITELY CHANGE YOUR PROXY BEFORE STEP 7!!!
7. Ok, now you will use the keylogger and send it, BUT send it from an anonymous email service, or learn to fake email/email headers.
8. Once you've recieved your results, please if you feel in danger because you KNOW FOR CERTAIN that they've *****ed you down, or they've done a lawsuit or something, get a lawyer and destroy the laptop!
*. If you've followed all above steps, it's completely impossible to ***** you down. With the laptop which did gone, and the anonymous email being anonymous, you should be good-to-go! Oh, of course delete the email results of the keylogger. Besides that, the laptop should be the ONLY evidence you did anything.