you never start the game with a scanner
and you learn the timing and look at the time in game and know ok this is a window when this champ can gank me let me play safe and not push the damn lane.... and over extend and let me place a ward during the expected time of a gank based on where and how they start
so its a gank typically at what 3 min mark?
you should have both charges of your trinket by then
and if you are that worried over a gank at 3 mins wouldnt it be a smart investment to alter your starting item to where you can included 75 gold for a ward if need be
cuz if you dont and die what does that cost?
man the game is so difficult that you cant just blindly lane and over extend and think and try to understand the movement and gank timing of junglers
or let alone the way the enemy in lane plays when there is gank coming
[zombie-brand-facepalm]