Personally I'm not a big fan of pedicures, but I understand some women and men love them. In order to have a safe experience and prevent future injury, there are some simple tips you can follow.
Don't soak in the foot tubs if you go for a pedicure. It's extremely difficult to sanitize the foot tubs. Even with the most proper cleaning techniques, bacteria and fungus can be living in the tub. If you must soak in the tub, don't shave your legs before you go. When you shave your legs, you create micro tears in your skin, which are an excellent portal for bacteria and fungal infections.
If you go for a pedicure, I usually recommend cutting your nails before you go. But if you want the nail technician to cut them, have them cut them straight across. Don't let them dig into the sides. Don't let them push your cuticles. The pushing of cuticles can lead to nail fungus, which is extremely difficult to care for.
If you have corns or calluses on your feet, under no circumstances allow the nail technician to use a razor to cut your calluses. This can lead to serious complications.
If you go for a pedicure, I usually recommend buffing and painting only. This is the safest way you can avoid injury to your nails. If you're diabetic, if you have circulation problems, if you have a compromised immune system, do not go for pedicures ever.