Ike's deal with the greys was declared void and a shield was put in place around Earth 20 years ago, no abductions or anything anymore since the Federation runs a tight ship until Earth is freed by forces like Q and the Alliance against the Cabal.
Some exceptions are made for the purpose of disclosure for example (according to kabamur) this bad guy craft was intentionally let through then swiftly eliminated for demonstration purposes. Light forces have superior tech and manpower (alienpower).
https://www.military.com/daily-news/2018/08/03/greenland-air-base-unharmed-apparent-meteor-explosion.html