"Hot Chinese Women Are Waiting to Meet You Online"

Am I the only one to notice that Norton 360's email filtering seems to have become less aggressive lately?  Message headings like the one above used to be nearly all swept neatly into my junk mail folder.  Now quite a few of them are slipping through into my Inbox.  I've had a whole bunch lately trying to interest me in a Facebook Dating App, something I don't think my wife would approve of!  I keep flagging them as junk, but Norton doesn't seem to have got the message - are the folks at Symantec losing their grip?