Given that the exit of Ms Vorderman from Countdown is being trated by the media as some kind of event on a par with the death of a prominent member of the Royal Family, I think it's time for a little perspective here.
Ms V is (was) extremely highly paid for what is in essence a supremely simple task involving the level of presentation and numerical skills that a year frull of Oxbridge graduates could perform for a fraction of the price ... and indeed that is exactly what is happening.
As advertising revenues shrink alarmingly, evey commercial broadvcaster has to look seriously at the outlay on presenters' salaries, as against the actual value for money that they represent.
In the case of Countdown, where it is patently obvious that the show is about the format, and less about the host, and not at all about Ms V herself, then it will continue and in a few months time,
Ms V will be less the 'Queen of Countdown' as the media portray her - an image she is delighted to endorse for an eight-figure salary - than simply another fairly average presenter who will have to compete in an increasingly competative workplace - pretty much like the rest of us.
The short answer to your question is -
No - I don;t watch the programme, so a boycott is not a feasible form of protest for me, but if i did, I would not dream of such a protest. It's only TV, and not especially entertaining TV for all that.