Sometimes offer a draw when opponent wastes time playing on in a lost position. If winning is that important to the opponent then let them have their little point.
do you offer draws in lost position?

I'll sometimes offer a draw in a lost position as a joke. If they accept, i proceed to chastise and mock them for accepting an absurd draw offer in a won position that i clearly didn't deserve.
If they then ask why i offered an undeserved draw in the first place, i try in vain to type out one of those stupid emoticon thingys with the stupid face and arms raised like "How am i supposed to know??"
And then i call them a "sucker" and finish them off with a "LOLOLOLOLOLOLOLOLOL!!" and ride into the sunset with my stolen non-loss.
Wow. You must be really proud.

I stopped offering draw in drawn boring positions, because I've noticed that 99% of the time, the opponent interprets my draw offer as "He probably thinks he is losing, that's why he offers me a draw", ,declining the draw and dragging me to a long boring game that ends in - surprise surprise - a draw.
Actually, I also had some nice games, where, after my draw offer, the opponent pushed the drawn position too much and lost, that was very very sweet
I had a 30 miute game recently one move away from mating this guy he ask me to draw (my next move would have mated him no matter what) I declined the draw he just quit playing.
Their are low IQ people out there
Yeah, I've done the same thing, just leave get a drink or something to eat and come back, and then laugh at all their rantings, and make a move after they do when they suspect you have left...