This is likely to be true, but I must take issue with the assertion that "all it can do is hurt you". It is far likely to not matter at all - especially if one doesn't use that party as a reference, and if one was so unjustly treated as to be prompted to say such a thing; why would one do so? Still, one should also probably err on the side of discretion - it's certainly not bad advice but it isn't the one answer.