We do care about this issue and have done a lot of tests and research to see if there is anything going on on our end. I set up myself 10 different email accounts on my test profiles here and not ONE of them received spam.. Not one. I didn't use those email accounts at all to send messages, I only receive newsletters, ebots, that kind of thing into them.  We changed some things on the newsletter mailing to see if that would have any effect, it didn't.  We are still researching.
I just wanted to let you all know that we have taken this seriously and I myself have communicated with quite a few members getting different information from them to pass on and we have done tests, etc.  
There are literally hundreds of ways for spammers to get what they need unfortunately.  I use my spam filters on my active accounts I use everyday (I have 7 different email accounts some completely unrelated to here as they are personal accounts and I get spam on all the accounts, used here or never here that  I use actively)

We are still doing some investigating so please try and understand that.