I do understand that it's a widely accepted convention that reviewers watch programmes before criticising them.

She was a controversial poet, and stopped her activity in the academies when they tried to force her to adjust herself to accepted convention.

His works were characterized by social satire, progressive thinking and outspoken criticism of accepted conventions.

They all seem to go against the normally accepted conventions without worrying about the consequences of their actions - they may, after all, be wiped out tomorrow.