[kensmith]

The key is any linking software that leaves a footprint is bad IMO. That is if you have to link to them, or if there is something in the code, or any other way that the search engines can see that you are using something that automates the process. You along with the whole group of sites using that software can be penalized with a simple change in algo that looks for that signature/footprint and panalizes for it. More likely all of the links will just get devalued and your Trust Rank will go down, but that will effect your rankings also.