If you can make it work then its not dangerous, the problem is very small changes 5 to 7% can cause instability issues. Someone please correct me if I am wrong however the only problem I know of is the difficulty attaining stability.
From Bit-tech forum
"CPU Base Clock Since Intel choose to use just one clockgen on Sandy Bridge hardware (apparently due to the way the internal CPU ring bus memory controller needs to stay in sync - see What's New in Intel's Sandy Bridge for more on this), this value has a maximum adjustment of under 10MHz, or just 10 per cent. As such, much more acute 10KHz (0.1MHz) adjustments have been added by all major motherboard manufacturers to allow some changes.
Matched with voltage changes listed below, you should be able to increase the base clock to 105MHz on all CPUs, and we've found a few will go as far as 107MHz, if you go nuts with the voltages. While a Base Clock as high as 107.8MHz might unlock 2,300MHz memory speeds, the extra voltage (and motherboard stress) generally isn't worth it for an everyday overclock. The bottom line with the Base Clock is that generally you don't have to touch it."
someine said that i coud frie my system, Mine is fine at 1.8 at 4ghz (i5 3470)