I have to say that it is beyond bizarre that upon saying you wish to dedicate your life to the learning of young people who will go on to become doctors, engineers and politicians that you would have a response that you would abuse this positition to molest younger thus vulnerable children.
I would strongly recommed you take this comment at face value and if anything find someone you can talk to about these comments to just discuss them for the fact they are happening, (make sure this conversation is not with your future employer i.e. headteacher).
My friend wanted to become a firefighter after his a-levels and was doing so as a retained (part-time) whilst working at Tesco, where he got to manager at 20 years old. He decided that this is not what he wanted to do and so re-trained to go to university and become a teacher for year 6, so the year before going up to secondary, and learning this I have to admit I didn't think paedophile but I thought wow, what a great career, as I remember being taught by women all the way up to year 6, but then we had this male teacher who was great, funny and really inspiring.
This friend of mine graduated and became a year 6 teacher like he planned and he is doing great, got a nice girlfriend and goes on holiday and he is planning his life and thinking of getting married!
So focus your mind on having a great and rewarding career and the wedding day with a beautiful woman not the comments of immature and pathetic people who won't be there in the future.