It's a game flaw to allow such name/pid spoofing, so EA must be contacted.
So called patch 1.50 is long awaited and promises to fix this.
For the time being you should contact EA. The hackers/stat padders who get caught will try actions like this when people find and report them. You should report stat padders directly to EA and not in any public forums.
Believe me or not there are cheaters who will get their GUIDs intentionally banned while using hacks to get the name os know players on the ban lists. Of course, its their GUID and their IPs logged, but some people will be lead to think the hacker was the inocent player. So they will do the same on stats padding servers. All thanks to name/pid spoofing.