[ibay]

If you do it after you've established your competence, you'll get interrupted a lot by "witty" remarks.

If you do it at an interview or something, you'll get a lot of people questioning your competence and fit.

[lmm]

It's still not remotely the same as an actual dress code, which you will get in trouble for violating even after you've established your competence.

[cema]

A good point.