When you've worn them down, they realise how much they need a break?
opponent take vacation when they're losing

I do note that they usually come back, and make a move before the vacation time is up. I guess they are hoping to catch you by surprise, and win by a time out. Sneaky. But all is fair in love and war.
Make war not children......Marum. (Die schahchspielen Katze)
Why is it, sometimes during a match when ive just taken the lead my opponent goes on vaction, suspect I tell you, suspect!!
Be sure to welcome him back with checkmate when he returns from his trip or cruise!
There are some passionate people on this subject. One must realise the use of illogical abusive Ad hominem to substantiate arguments rather tends to 'colour' their own character, not the subject originator.
Brosche

This is dumb.
I have usually 15-30 games going at a time. I just took some vacation.
Some games I was winning, some losing, some drawish. Just the same as before I took vacation.
Maybe someone is so egocentric as to think their one little game is the only one that matters.

Aww! I have an IQ of 15 but then I am only a little cat.
Grrrooowwwwlll.Marum. (Die schachspielen Katze)

Aww! I have an IQ of 15 but then I am only a little cat.
Grrrooowwwwlll.Marum. (Die schschspielen Katze)
A cat who cannot spell but can play chess?
They don't call them idiot savants for nothing!
It is not my speeling,but my typing. My claws can b a r e e l y reach to the "a". This timee onee of my claws got stuck in thee"eeeeeee". Damn!......Marum

Seriously though. I got flooded in Brissie earlier this year. I now realize that I could have used the vcation time. So. I would have gone on vacation, in games that I was both winnning and losing. However that comes into the "could'a, would'a, should'a", category. At that stage I was not aware of how the option worked.
I just hope this gives some of you a different slant on things. Strange as it may seem, some of us occasionally, are too existentially occupied, to worry about chess. I actually don't even own a Chess-set anymore. Can you picture it when a friend comes over? There I am on my PC, and there he is on his laptop, sitting in the same room, playing each other.
But. "Tis an ill wind that blows no one any good". The hit my ratings took, has enabled me to spring a surprise on a few, in games we have since played.
I guess we all have this problem - the computer rates me at about 2000 on the games I win. But about 2 on the games I lose. I usually simply hang a piece, or make a total miscalculation.. If I could just purge those stupid mistakes from my game. (Dream on)
Purrr Purrrr......Marum. (Die schachspielen Katze)

Thankfully the owner was wise enough to clamp down on the abuse that used to exist.
I would say you cant even do this.
When you go on vacation you do it for all your games. When you come off vacation, you come off for all your games. You cannot pick and choose.
So if I go on vacation and someone says :
"Oh look, InvisibleDuck was getting hammered in game #27!"
Well, so? What about games 1-26 and 28-35?
If I come out of vacation to answer up game 27, I have to do it for all my games. Suddenly I am not on vacation, suddenly I am playing chess again. What was the point of vacation, then, I must have forgotten; too busy playing chess.
The only case where using up time is even bad sportsmanship is in live games, because the winnner has to hang around the dead opponent for 10 minutes while the loser goes off for a sandwich. But in an online game, no reason to care. You shut the computer down and go about your business.
Why is it, sometimes during a match when ive just taken the lead my opponent goes on vaction, suspect I tell you, suspect!!