Well, this will be my last engagement back atcha but here goes.
Re 'eating away', as my post says, I asked whether you meant me or the OP. Perhaps it seems a stupid question, and I thought you almost certainly meant the OP, but I wasn't sure and wanted clarity. I didn't want a passive-aggressive little dig about over-investment.
It is not always easy to 'play along, laugh it off'. I was bullied for a myriad things including being too tall, too lanky, too much of a 'swot', wearing the wrong clothes, liking horses, being bad at sport, having teachers for parents ... and a few more things.
I could not just ignore them: they came up and said things right in my face, followed me in the corridors and out to the bus, surrounded me in class, threw my bag around the classroom, tripped me up as I walked past, harassed me in the canteen etc etc.
Good for you that ignoring or playing along worked and that it 'didn't really affect' you, and that you got your own back. This was not my experience. I suspect it is not a lot of people's experience.
And, much more to the point, as appalling as this behaviour is the one bright spot is that usually it stops once people grow up and move into the world of work. In the OP's case, unfortunately her colleagues still seem to be behaving like silly schoolchildren. I will not condemn the OP nor call her a 'precious princess' or say any of the other hurtful things people have said here, because, as I've said several times now, I think it UNACCEPTABLE that an adult should have to have coping strategies because their colleagues are behaving like children.
And telling her to toughen up or ignore it or laugh with them or whatever is just enabling them. And anyone who suggests those things ought, IMO, to be ashamed of themselves.