Yeees, this sure is a 'pet' subject for me!
Operating B747-100/200/300s for AAI for more than five years, one can't help but be in the firing line reasonably often.
Other than straightforward trying to talk me out of writing up defects, and there were a few, there was the practise of 'fixing' MEL items on the last day of their repair period.
Only to have them written up again the very next flight (because there had been no actual work done!), and the same MEL applied for another repair period, this sort of thing is common practise, and the Ground 'Engineers' think that its quite OK.
I've had mechanics actually swear at me when I've written up a problem, they wanted to get back to the pub!
I had enough one day about 18 months ago in KL on the Malaysian freighter contract, and blew my top at the Ops people for their continuing mis-handling of just about everything, it all just came together one day.
Consequently, I'm doing something else now, and loving it!
Cheers