Before you smash a convention, be able to explain why it existed. Then smashing it says something.

Most conventions began as a solution to a real problem, and a good number of them are still quietly solving it. Breaking one without knowing what it was for means you will meet the same problem it was preventing and have no idea what happened. Knowing the reason is what turns a break into an argument rather than an accident.

Before discarding a rule, find out what it was protecting. If the problem is gone, break it freely. If it is not, you now know exactly what you will have to solve another way.