This isn't just the case because the ratings here aren't established. Even if you walk into an OTB tournament and see an opponent with an established rating 500 points below you, it's possible that they're underrated momentarily. For instance, they may have stopped playing in tournaments 3 years ago, but they've continued to improve playing on the internet, and now their rating is about to catch up. Besides, part of the ELO rating system is that there's at least a 5% chance of an upset in any game between two players with a rating difference of 400 points or less.
As you said, play the position, not the player. Don't underestimate anyone.
--Fromper
I have solid tactics most of the time but I recently got schooled by someone because I was stupid enough to judge them by their rating. And where I should not, for their ally was the force...
Let me just remind you that this is a new chess server and the ratings don't mean much yet. A lot of the new members will be under rated until they have played enough games to get their rating up. And others will have high ratings because they won a few games in a row but they haven't played too many people.
Basically the point of a rating is to give an approximate range of strength. their isn't too much difference between a 1450 and a 1550. That's why they are both part of the same class.
Mostly, if you are playing less than your best because you think this is a relaxing game with a fish you will be spanked. Your opponent is always ready, willing, and able to pounce on any weakness. If you can not muster the competitive spirit, concentration, or self-discipline to do your best... *SWAT!*
Also, it is just plain bad chess. You should play the position not the player. Disrespect their skills at your peril! If you won't give them respect then they will take it. Believe me, it is no fun having passed pawns shoved down your file.
Learn from my mistake.