Geoenginering - tech fix or death wish?

Jim Lovelock says (& the Guardian prints-- so it MUST be true?) that "Before we start geoengineering we have to raise the following question: are we sufficiently talented to take on what might become the onerous permanent task of keeping the Earth in homeostasis? Consider what might happen if we start by using a stratospheric aerosol to ameliorate global heating; even if it succeeds, it would not be long before we face the additional problem of ocean acidification. This would need another medicine, and so on. " Is geoengineering THE solution or the WORST possible direction to head?
Gille