Of all the things for Jews to worry about in today's world, I can't think of anything less important.
I absolutely agree with you. I say the same about Mormon baptisms of the dead. Go ahead and baptize my ancestors. It means nothing to me. I don't believe what they are doing has any effect. So go ahead if that floats your boat, baptize all you want.
Actually what the Mormons do has a very positive side-effect. They've built up a fantastic geneological database which they've made available to everyone, all on their own dimes. If it makes them happy to baptize people's ancestors, then as far as I'm concerned that's a great quid pro quo.