[c-nsp] ISIS MTU Ignoration good/bad???

[Adam Vitkovsky]

Hi folks,
I have just recently noticed that newer ISIS implementations actually ignore
interface MTU discrepancies. 
I was relying on the local interface MTU comparison against the IIHs size to
discover any MTU inconsistencies. 
I believe there should be a knob to enable/disable MTU comparison same as
there's currently a knob to turn on/partially-off/off(XR) the IIH padding. 
I'd like to know the opinion of the community on this matter please. 

adam