The only problem I have with high heels is practicality. They put too much stress on the foot, and are easy to trip on. And I think ties are a complete waste of time--what honest purpose does a tie serve, aside to serve some arbitrary standard of dressing up? None.
Of course, I would not be for enforcement of any standard of what is "too high". As with tight pants, there are disadvantages to wearing excessively high heels, and one should think of those disadvantages. But, there might also be advantages to high heels that offset these disadvantages, and in situations where the advantages outweigh the cost, by all means wear them. I happen to prefer clothing that fits comfortably and does its job without needlessly creating safety or health hazards (and that goes as much for shoes with untied laces as for high heels, which I feel are even more hazardous).