Of course it's bad that up to 100,000 (which sounds to me like a pretty high estimate) will have their travel plans affected, but what has happened at Heathrow airport over the last couple of days has been a powerful reminder of the power that working people have. Despite the castration of trade unions, the de-socialism of the Labour party and the general right wing shift in debate and politics, it is still an option to stand up for what you believe in and not cower before 'business paractice' and the threat of people taking your job away.
The strikes in solidarity that grounded British Airways show what happens when you fuck people over. You cannot treat people like that… and if you do, you deserve what ever they throw back.
On a connected note: never trust a man who has no values.