I thought the BK ad in question was rather in poor taste (pun intended). Still prefer their burgers, shakes and onion rings to those of McD's any day of the week. I've more or less shunned McDonald's food ever since the great Beanie Baby rush of... whatever year that was. Not long after the voluntary boycotting of their food began I ran across something that absolutely turned my stomach.
Happened while I was cleaning out my sister's car back in '01. Apparently she had never cleaned it in all the years she's had it. And that's where I made the discovery, dateable food. Bags containing leftover McDonalds food in the trunk of her car that dated back to the mid-90's. Burgers, fries, chicken McNuggets, it all still looked fresh and smelled normal!
Since then I've only eaten at McDonald's twice. Both of those times being simply for the purpose of being sociable with the persons I was meeting with there.
Don't eat at them often due to the expense, my my two favorite fast food restaurants are Chik-fil-a and Hardee's.