No, not in the way you describe (I think). I think you mean within a context adding additional 'please' or 'thank you', so no.
But yes where I think it will introduce additional weight to my prompting, e.g. 'Ensure the output is orange' is not the same weighting as 'Please ensure the output is orange' and that is not the same weighting as 'PLEASE ensure the output is orange'.
But yes where I think it will introduce additional weight to my prompting, e.g. 'Ensure the output is orange' is not the same weighting as 'Please ensure the output is orange' and that is not the same weighting as 'PLEASE ensure the output is orange'.