Take this either way...I was going out to the desert and I saw a F150 towing a weekend warrior with only his bumper. I do know if you look under the bunmper there is a huge bracket going from framerail to framerail. I think you should be fine.

 

That person should have his driver license taken away! That is just stupid/foolish/selfish/etc/etc...

 

Yes...my friend threw a twinkie at him for being an idiot.

 

You should be fine I towed with the bumper on my old truck stay within the limits you should be fine.