Hoping your opponent would resign in frustration or simply blunder from impatience and feeling you did nothing wrong is one of the telltale signs of poor sportsmanship. It's not against the rules of chess, which is why the game attracts such high numbers of bad sports and will never be taken seriously outside of the chess community.
This.
Imagine you fall into a perpetual check and, instead of accepting a draw, you keep on moving your king for the rest of the 30 minutes expecting that your opponent gets frustrated and resigns or that he just moves his piece on the wrong square accidentally.
Is that against the rules? Probably not. It's a poor sportmanship? Tell me how would you feel if you were the player who is checking repeatedly.
Does this concept exist in chess?
I was recently accused of poor sportsmanship in a game because I refused to accept a draw in what is commonly acknowledged as a drawn position. Although the game was balanced in material, I continued playing for about 50 moves, running out the clock and hoping that my opponent would resign in frustration or simply blunder from impatience.
The game ended when I finally got tired of toying with him and drew, but I feel like I did nothing wrong. I have definitely won a game or two like this in the past, so I generally refuse to draw any game where I have mating material unless I get bored and want to watch TV or something.
Does this make me a poor sportsman?
You have only been here for a few days and have played no games at all.
Did you get thrown off here previously for "toying" with your opponents?