[locksley]

Because of the nature of this site, we are very sensitive to any security related questions. Sorry!

Without revealing anything specific, we have a number of trigger conditions and any bet size over or under the limit is a trigger condition. That marks the bet as invalid and manual admin action is then required to refund the bet.

[fastball]

Security through obscurity is no security at all.

[oh_sigh]

I don't think you understand that quote. Only security through obscurity is obviously no good, but that doesn't mean that security through obscurity is entirely worthless. It plays an important role in a layered defense for information assurance.