To be slightly irritated by something.

The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.

To be slightly annoyed, specifically with someone or something.

Bewildered.

To be confused.

peaved; mildly annoyed and mildly effeminate

annoyance ranking:
* pissed off
* tit in a wringer
* ticked off
* undies in a bundle
* miffed

miffed, to be annoyed or umm, bummed off.
miffed is a simaliar word to peeved, but miffed is better.