I don't think it is disrespectful to refuse a draw simply because the material is equal. That just means that both sides have equal prospects of winning or losing -- not that a draw is inevitable. I do think it is somewhat disrespectful to refuse a draw when it is clear that forced draw (e.g., by 3-fold repetition) is available to the person offering the draw. That implies that you do not believe that your opponent is smart enough to recognize the forced draw.
What is extremely disrespectful is offering a draw in lost position. I have experienced that several times in USCF tournaments with young kids as my opponents. Typically, they are losing terribly (e.g., down a queen) and offer me a draw, as if I would be so stupid as not to realize that I am winning. In one case, I had mate in 2, and the other player offered me a draw. At first, I thought he was resigning. When it became apparent that he was offering a draw, I actually laughed out loud!
It`s sort of like when I was playing tennis with guy I was teaching the game ; we had a situation in which he smashed an overhead that almost ripped my balls off. I know--part of the game. I jokingingly told him that he should have asked my permission before that match if he could do so if the situation arose. The point I`m trying to compare to is that even in a "dead drawn" position, if you are the lesser player do not, I repeat, do not ever offer a draw unless you are within 85 points of your superior opponent--show respect!
A 'dead drawn position' (IMO), is a position you abslotely KNOW how to draw with your eyes closed. In such a position it's ok to offer, no matter what the ratings. Just dont mess it up, lol.