sick announcements? Announcements can't be sick. I reckon the grammar of the first half of the word isn't really the best aswell. But yes, it's on the 'understandable' level.
Yes they can. E.g "Look at this announcement! It's sick!!" or "Look at this announcement! It's bloody sick!" 'Sick' in this context meaning "cool".
What comes to the actual word, it's either "sairausilmoitus" or "sairasilmoitus". Both sound fine to me as the first one suggests it's an announcement of a sickness whereas the latter implies it's the sick one announcing. It is, although, supposed to be spelled all together.
Also I don't think they've ever been so much selective with the recruiting side, since most of the drivers of the teams are truly behaving like drunk people, and driving on CAD standards.