We can't be expected to police EA's/DICE's Rules of Conduct/Terms of Service/End User License Agreements.
There are limitations which can be imposed by game developers to help prevent against stat padding and which could be used for detection. However, distingusing a cheater from a good player at the third party anti-cheat level... where's the base line? what's the probability of raising a "stat padding violation" against someone who's innocent? One person's opinion on a statistics baseline doesn't always meet the opinions of others.
We only raise violations which have evidence to support those violations, the integrity of our MBi is always a number one priority around here. The minute anyone goes out there on a witch hunt, with a tick sheet to determine possible stat padders, they lose that integrity and respect.
Say you had a really good few rounds and you met someone's tick sheet... I bet you'd be really annoyed about getting a violation against you. Imagine if PBBans was the organisation which raised that violation against you? that's a loss of reputation and a ban from hundreds of streaming servers per game. Not to mention the adverse effects on the A/C organisation who banned an innocent individual.