Besides whats the probability off an insurance company looking in to forums and finding a car insured under there name.
I'd hide my registration number from any photos if I were you - you'd be surprised how seriously insurance companies take this stuff - after all where are they most likely to find modded cars? Owners clubs? Yup.
Insure your car properly - I pay a SHITLOAD for insurance for my standard QG15 N16 - no doubt because of the amount of effectively uninsured drivers that haven't declared their mods