Disambiguify it and say "we're not trying to be a bunch of nightclub bouncers... we just have a large car pool"
I think there are people who would complain about a car pool too. Really, they just want the tech people to stay out, and anything that enables them to move in (like carpools or buses) is going to get complaints. The buses are a visible symbol, but not the root cause.
These children are paid above median income, espouse libertarian ideals, refuse to participate or share, and require their own shuttle service separate from 'the natives'.
It says something that to draw 'talent', you have to implement a separate transportation system to appease their fragile sensibilities.
If Caltrain or BART made the same trip and was even a tiny bit faster or more reliable most would switch in a heartbeat.
The problem isn't Google buses. It's that these tech companies don't pay any fucking taxes. The right way to solve this problem is to make them pay their damn taxes like normal people, and to use that money to build housing until it becomes affordable again (and then everyone can leave the buses alone). And if a corporation is bussing people in from San Francisco, it should pay SF taxes as well instead of being a fucking tax-evading suburbanite.
So your proposal is that people who don't work in tech, say someone who spend upwards of $100000 on an expensive liberal arts education and has a good sense for making good soundbites but not enough money should be allowed to enter the Google bus and drive down to the South Bay and back? It is a fucking bus that moves from point A to point B. There will be people who will hate you for anything you do. Always.