This is one of the must have tool if you into checking out new stuff on the web but want to keep safe at the same time. Though antivirus and anti spyware will warn you, this tool will let you see what is actually going over the wire. Every time I install new software, I run wireshark to verify if the app is a spyware.
mywot is a scam and a spyware site. Their browser add on sends all of your browsing data back to their servers!! You can see for yourself by running wireshark. If you really want to be safe on the net then use some real security tools like norton, mcafee, avg etc