Mostly because if something happens to someone's server later (like a hack or something), it's better to never have had access to begin with so no one can point the finger at you (and along the same lines, I'm just a random person on the Internet to you, you shouldn't be giving random people you don't know access to your servers.. haha)
If you have a test/dev setup I can take a look for you if you want, but going through and disabling existing addons to try and find where the conflict is on a live site probably isn't the best thing to do.