if the system could be fiddled or if people were so blase regarding slot times that they were ignored.
Slots are taken very seriously by all though you'll always get the odd
who ignores them because it suits them and sod the poor guy who'll be overloaded.
The system used to be open to abuse but by stopping the use of retrospective DLA msgs (eg delaying flight to 1020 at 1030) and making all AOs delay flights if they had gone past EOBT +15, the playing field got levelled for all. Therefore it's not fiddleable in that way anymore.