I have noticed the same thing....it's getting so bad that I have started to delete any new messages that come from somebody who doesn't look familiar....If it keeps up I will stop using the private Messages feature all together.........
It's also why I stopped replying to so called new members when I see only one posting....many are turning out to be uncredible......
I have to agree with wp23n:
"I COME HERE TO GET INFORMATION ON MY CHALLENGER AND POSSIBLY PASS ON INFORMATION, NOT TO GET A VIRUS"......