Hi people, sorry if this has been discussed at length before, but a quick search didn't reveal anything and I'm an infrequent vistor to the forums.
I recently been participating in many more tournaments and have started to notice people resigning part-way through games, sometimes even when they're in winning positions and certainly when the game could still go either way. I've worked out that they're doing this as soon as it's mathematically impossible for them to reach the next round of the tournament.
Although I'm happy to take the ratings points, this irks me slightly, because I feel like I've been cheated out of a potentially interesting game of chess. Also, I suspect there's a more sinister aspect to it, which is that the resigning player keeps their rating lower than it really should be by throwing games they might have gone on to win. This presumably means that they can compete in banded tournaments that are really below their standard.
Is this commonplace? Is it accepted practise?