Not at all, play what tees you want, and hopefully the rest of the group will play what they want as well, golf should be fun for everyone, I do it all the time when my kids or wife are playing with me. I've even had an event or two for work where you'll have a couple in your group playing the up tees. Once I was the youngest guy in the group and they had to wait on my to hit from the back, not tips, tees every hole!