What might "Disclosure" mean?

A lot of talk going on about alien "Disclosure", but what do you think it would mean if it came about? Any ideas on what the implications to humanity (and the world) might be?

When I say the world, I mean the planet, wildlife, ecosystems etc. For example, would an increase in "alien-traffic" be bad for the environment - increased air-pollution?

I realise this is highly speculative, but just interested to get peoples ideas on what might happen if there was disclosure.