Seismic wonder, you don't have to be a professional to pierce ears. The lobe and cartilage doesn't have any major veins running through them. Now, I would never pierce anything else, example: eyebrow, belly button, lip, tongue... etc.
I don't believe in certain piercings, tongue etc. For all the people that consider having their tongue done, please, do it professionally, there is a major vein in your tongue, and if you hit it you're done.
There are certain piercings that don't require professional skill... ears and nose.
The kits at
walmart are just as safe and clean as a professionals equipment. Now, when doing it yourself, you can clean them if that would make you feel safer, but the little disinfecting swab included in the kit is exactly what the professionals use to swab your ears with before piercing.