Blogging is good. Blogging is not evil.
You are dumb enough to make it evil.
Please, my friend, PURRR-LEEAASSEE...dont use blogging as a weapon to attack the school anymore. You can express you feelings as i said before, but dont overdo it. If you want to complain, use proper tone and style. Say it out politely instead of poking people straight into their heart (like pucheekk...blood rush out of the beating heart...aww...)
You can write to the principal through official letters too.
Just don't be stupid enough to attack the school. Don't spoilt the blogging industry's image!