Several things to say about this.
1) Its great to see that the support via the petition ratios for CP. Unfortunately I don't know how much of this is because of the general support for wildlife and how much is just that he is a celebrity who people know and like from springwatch. It would be great if more fell into the former category.
2) I applaud any celebrity who makes a public stand for what they believe in when it may ruffle some feathers. It's all too common to see celebrities jumping on the band wagon of popular causes (comic relief, children in need for example ironically aired on the BBC)
3) I would rather see a celebrity using their fame to drive a political agenda they care about and raise awareness. It shows they are not completely vacuous as many appear to be and in some cases (Ian Botham) it shows them up for what they really are.
4) The speed with which this petition has gathered signatures contrasts with many wider, sometimes globally significant petitions which struggle to attract attention is baffling. There are many such petitions highlighted here on BF. Go sign some right now before it's too late. (Banning of driven grouse shooting, fracking in the UK, drilling for oil in the arctic, use of diclofenac in Europe). There are millions of us who are supposed to care but it's too much trouble to stick your name on a list?!?