It's rather easy to extrapolate the whole range in a couple lines of code, it's finite. I never saw mass PIN spamming reported before. Do the requests come with personal messages? Are they addressed to you?
Since we never had mass PIN spamming issues on some thousands Blackberries i would assume you received 6 messages over 8 months by mistake. Or someone with a similar looking PIN posted it in facebook or those PIN-exchange places. Or you may have done it yourself over the months and don't remember about it.
In any case, try the firewall blocking options for now, and let us know how it goes.
|