I think that there is a degree of incompetence involved, but it's the inconsistency that's the real problem. The refs aren't helped by the ever changing landscape of a 'flavour of the week' focus on a particular law - usually as the result of a perceived injustice to a 'big' team.
But Spurs do, I believe, suffer occasionally because of a deeper entrenched problem. When the ex Man U, Liverpool and Woolwich 'legends' that stink up football coverage are happy to use the 'Spursy' comment ad nauseum it creates a subconscious 'order of things' hierarchy in officials minds - and I am happy to accept that it isn't a conscious or deliberate modus operandi generally. It's precisely why media is not allowed to comment when a legal case is subjudice. Refs are comfortable with an adverse decision because it's just Spurs being Spursy.
Did Keane, Wright, Merson, Neville, Carragher et al. call Brighton 'Hovesy' or Villa 'Villarsy' or West Ham! 'Hammersy' this weekend?
I don't even think it's wholly a malicious comment from the LivArsUtd pundits cartel - more a filler they resort to when their lack of intellect, vocabulary and original thought surfaces, and that happens very often.