I take umbrage at that, reesetee. I swing on cast-iron just as well as any other bear. And as for it buckling under my weight--let's keep in mind that *chains* weigh something too. I can buckle it faster. And smell less while doing so.
Oh no, of course not, yarb. Usually I use the chains to my advantage--swing them over something, grab it with my other paw, and cascade down a mooring rope a la Errol Flynn or Jack Sparrow--that sort of thing. I daresay they'd be a help rather than a hindrance in buckling your in-laws' bird feeder.