I spoke to a company that wants put cloaking on my site and put links to my site on their cloaked pages. They say they have designed it in a way that Google would never know and even if a human looked at it they would not know. I looked at their pages and when I click on links they have in the SERPS there are no links to their clients but when you click on the cache they are there. Their clients all have them in their backlinks. I have no plans to let them put cloaking on my site but I might have them put links to my site on theirs is that a bad thing?