I second the above.
Both Fedoraforum and Ubuntuforum seem to use the same software as Phoronix and yet both of them doesn't seem to suffer from spammers, even though both enable unlimited editing.
... I wonder how they did it.
Micheal, have you considered contacting them and asking their help?
DEV-NG: Intel S2600C0, 2xE52658V2, 32GB, 4x2TB, GTX680, F20/x86_64, Dell U2711.
DEV: Intel S5520SC, 2xX5680, 36GB, 5x320GB, GTX550, F20/x86_64, Dell U2711 (^).
SRV: Tyan Tempest i5400XT, 2xE5335, 8GB, 4x2TB, 9800GTX, F20/x86-64, Dell U2412.
LAP: ASUS N56VJ, i7-3630QM, 16GB, 1TB, 635M, F20/x86_64.