Yes, that was my thought too, hence why I asked them if that was indeed what they meant by it. An archaic/dialectic spelling of reckless is strange too though, so I'm not really sure which is more likely. Just out of curiosity - if it only just now occurred to you that 'rackless' could refer to her body, then what did you think I was calling the comment out for?
It's funny because it says a lot about some people who immediately thought it was a comment about breasts rather than either a typo, alternatively spelling or rack referring to data centre technology (on a technology site).
Has the OP confirmed that this is what the phrase meant? Because otherwise you're projecting meaning on something that may not have been intended (again, I have the back ground to recognize this kind of slur but I didn't see it in the original comment until it was pointed out). Why would you do that?