You can have a poorly edited laugh track on both ends of the spectrum.
On the one hand, the laugh track can be overused to the point where EVERYTHING is met with a laugh, not just a funny line, but even a head tilt, or a smirk, will be met with a laugh; then sometimes the laugh track can be underused, where in some cases, only certain jokes are met with a laugh and others aren't.
Then of course, there's volume. Some producers have this belief that if the laughs are louder, the jokes are funnier, and therefore the show itself is funnier, when that isn't necessarily the case... then in other cases, like a number of sitcoms today, the laughs can be so quiet they sound like a whisper, and that gets to be even more annoying than over-modulated, booming laughs.
The basic idea is to make sure you're not making the laugh track itself a star, which does happen in some cases; again, in most cases, it's actually the producers' say in what kind of laugh track their shows have: there are companies that actually supply the laughter for these shows, and there are people who go into the studio, add the laughter with machines known as Laff Boxes, but it's the producers who tell them what kind of laugh to use for what certain kind of joke, so the producers have to realize when to ease up and back off. It's something that takes practice. Here's a couple of examples of some of my own work:
The first of which clearly put a little too much focus into the laugh track - it comes off as invasive, intrusive, and overdone, in short, I ended up making the laugh track itself the star. The second entry is more recent, and by this time, I had a better understanding of just how to properly laff up something, and it comes off more natural in this one.