Just do whatever you want.
I had one dickhead lecturer last semester and when the university results came out last semester I basically abused the shit the out of him (through emails) for his shitty lectures (and the crap mark I got as a result). I even sent him numerous emails throughout the semester, asking him wtf the lectures were meant to about and asking him stuff about the tutorials and he would not say a thing, so I fucking blew up the jerk when the marks came out.
Insulted him and his waste of a subject area to specialise in. HA, a Phd is management is worth bugger all in my opinion.
Passing first year science/engineering is a better accomplishment than doing a Phd in Management.
Pfft... university management lecturers, bloody assholes and scum of the earth.