no they are not a sin..
this is what turns people against God!
They see ignorance in the church.. they want the truth, not opinions!
Ye shall not make any cuttings in your flesh for the dead, nor print any marks upon you: I am the LORD. -Leviticus 19:28 it says cuttings in your flesh for the DEAD, for one... the only reason God said this in the first place, is at the time, pagans were carving their God's on their bodies, and their living conditions weren't the greatest, (which is also why the verse before it was written)
the verse before it says:
Do not cut the hair on the sides of your head or trim your beard. -Leviticus 19:27
(woman in that time era didn't shave their legs either.js)
see, this is also where judging comes in affect, to each his own, it is not your place to decide who is sinning or not.UNLESS you are reading a verse, and it is black and white, and you have no sin in YOUR life. but we sin daily.so looking at it from your point of view, you too are a 'dirty sinner' lol o:
And if were gonna beat down Christian tattoo artist, then we also need to beat down Christian hair stylist, etc.
Just shedding some light

I am an ordained Pastor.. and i hoped I helped! ^^