Another message from Canada: Big Brother extends his tentacles even up here.
I've allowed the performance e-mail and occasionally it sends an e-mail when I open up Solidworks, but once open I've never had it mess me up during the session. I've never heard anything back from Solidworks, but then there have been no problems to speak of either.
I too am paranoid somewhat too, especially after I got a virus at home that was trying to mail something out. (My antivirus stopped it).
Tom Stanley