Is a 28 foot TH too much for a 2013 F150 with 5.0 V8?

Since most people's knowledge of their vehicle does do not extend past how to put Gas in it, even a few fail at that, knowing what their truck can handle and what trailer they can tow is far beyond their grasp!! True, buyer beware, but come on, a commissioned salesperson is by Job title a liar!! Trust me, I is one!!