I understand like basic ear piercings (like for earrings) and cross tattoos for Christians, that's fine. However, if they have an excessive amount, like to the point where it gets distracting, yes, it should be a factor. Some people with piercings stretch the part ridiculously, so much that you can usually see them dangle, which if you ask me, looks disgusting.
I have no problem with body modification, but if I was an employer I would have to consider tattoos and visible piercings. If I was running a tattoo parlor I would prefer a talented artist with tats rather than a talented artist with none. Likewise, if I'm running a professional office, I don't want to adversely impact the appearance of professionalism by having someone with a face tattoo.
It has been psychologically proven that tattoos and piercing are intimidating to most people. While this only applies to visible ones. If working customer service or human relations, body markings can scare customers and fellow employees. Its just apart of being well groomed, like keeping hair in check of not wearing excessive makeup.
Tattoos and piercings may be seen as intimidating to others but it is a form of body art, slowly homophobia is fading away and so should prejudice against those with piercings. Its understandable if people with maybe facial tattoos arent picked to represent a fancy company, but with jobs based on skill, it shouldnt matter.
When a person goes in to get a tattoo or body modification such as a piercing or a brand they do not think how it will affect their ability to get a job. Tattooing is considered an art, as is piercing others, in many cultures other than ours. In some cultures tattoos are viewed as a rite of passage, marks of status, symbols of religious and spiritual devotion and even decorations for bravery. Content of the tattoos are also up for speculation. While some tattoos may be offensive to some, or maybe even vulgar there are ways to get rid of them. The person can have the tattoo removed, covered up, or eve hidden under long sleeves, long pants, or collard shirts. In short, tattoos should not be a factor in getting or applying for a job.