transplanting carefully wont stun your VFT badly from what i observe.but if you use long fibered sphagnum moss for it,when your about to repot it and if your careless,you might break a root or two and that might stress the plant
spider web sometimes grow at mine too.not just VFT but sarrs also.but i dont see any bad effects
i spray with pesticide or neem oil to be on the safe side.
Thanks
Harris