I'm surprised it doesn't happen more often. Even in a smaller airport such as the one that I work at, if the pilot is unfamiliar or we are in LVPs, then there is a good chance they'll take a wrong turn or mishear GMC. I've heard it a fair few times, where someone's gone down the wrong link, or to the wrong holding point.
In fact a few weeks ago I had to assist a 738 from a certain budget airline that had gone down the wrong cul-de-sac and got stuck. I helped him turn around and get back out on the taxiway to head in the right direction. No damage was done as it was quiet but it happens quite a lot.