Well, I do chain lifting from the FEL on smaller stuff. For example, I needed to pull a 400lb motor from the bed of my truck and onto an engine stand. The FEL has a lift capacity of 1200lbs. I have noticed that when the loader is lifted above the c.g. of the tractor (center of gravity) a heavy load starts pulling the frame in a direction where it can tip - I have lifted 1 rear wheel off the ground, albeit not much, but on a non-sprung vehicle, 1-2 inches seem like 3 feet. so you learn. fast.
However, cub cadet (I have the 417 FEL) has 3 hooks welded to the top of the bucket. If not to attach chain then what? I have found that when the loader is left low, a chain here allows for a LOT of pulling power that cannot tip you over - unlike pulling from a drawbar.
So aside from being aware of the loader-high/tipping concern, it seems safe to me and given my engineering background, I rely on it to point out stuff that is patently unsafe.
btw - stickers are just that. sometimes they are CYA for the manu....for example, if you read the stickers on my atvs and sum them up, they read 'dont have fun', they implore me not to exceed 15mph (on a machine that does 55), do not jump (even tho it has a suspension designed for it), no wheelies, no night riding (that would explain the 55W halogen light they put on...) no riding in mud, no riding on gravel, no riding in sand, no riding on pavement. Yards only then?
See what I mean? My opinion is everyone has to evaluate thier own safety/skills and never exceed the capabilities of the machine. If your FEL lifts 1200lbs, dont try and lift the front end of a buick...
If you want something done faster, increase the voltage. But dont lick the black wire.