I also thought he was using it in the (older) British sense, referring to himself as a used-up, wet, cigarette butt, i.e. useless for publicity purposes. I guess the Brits have taken the usage from the USA, kind of a shame. (Soon they won't know what a "bloater" sandwich is, either!-) Used without a space as a single word, I had no idea it had accumulated this 21st-century meaning: https://www.urbandictionary.com/define.php?term=Oldfag
[Edit: Slightly OT: Once upon a time, I wrote a tech support article referring to the "brain-damaged" way our particular software feature (mis-)worked. Some customer called up to complain that we were disparaging the community of persons with cognitive impairment or intellectual disability. My colleague -- in a brilliant save -- told the customer that no, the reference was actually because the feature "had been damaged by the *action* of our programmers' brains" and was not pejorative descriptor, in any way. Nice try, but that customer was mollified at least...]
That's irrelevant. The "f" word to a gay person is just the same as using the "n" word to a black person. It should just be avoided. It does cause offense.
No it doesn’t. Speak for yourself. I don’t find it in any way offensive. But I also have a backbone.