Agree. Any team had the same opportunity to sign him post-draft as well. It's one thing to cheat the rules but in this case the Cowboys took advantage of a unique opportunity, completely within the rules, which all teams had.
We'll see how it works out. Obviously signing him as a free agent pretty much comes with little/no risk but it's not as if Collins is a sure-fire hall-of-famer. Notwithstanding the mystery surrounding his pregnant ex-girlfriend's death, there are questions about his effectiveness in pass pro to the extent many project him inside. His dedication and work ethic have also been questioned by his coaches at LSU.