I bet you don’t hit up the produce guy from your local grocery store in his tumblr
and ask for all sorts of advice on fruit, free services, and samples.
Don’t do it to a tattoo artist you don’t know and will in all likelihood never become a client of. I don’t ask you to do your job for free on your downtime, and I respect that you have a personality outside of your vocation. Please allow me the same courtesy.
Stop doing it to your friends who work in I.T. too, they also hate it.