Question about italki teachers/tutors

Sometimes I look for new friends to talk with here on italki, but then I notice they're teachers and I don't dare to send them a message. I know it sounds silly but I feel like they may be offended or something. Are italki teachers interested in doing informal language exchange or they're available exclusively for teaching? Does it depend on the teacher? I probably know the answer but I just got here and I would rather know about your experiences on this matter.

Thanks!