Kinda like how i only play ''troll''
It's just more fun so you don't get as tilted during the game cos you have fun anyway and while that might not even affect your current match necessarily it does affect the games that follow.
Also losing to weird ass troll stuff is frustrating to opponents so they get very prone to tilt which they will as their metaclown brain can't handle it
Plus you might accidentally hardcounter people
like how i picked
mid into 
and the guy probably thought oh hes trolling let's do this
only to eat a face full of ghouls every minion wave and then having to back because he was oom and could not farm with basic attacks because getting walled in meant flash are death
then thinking alls fine after getting tabi and mana to push me in and roam with ult only to either lose herald or drake depending on where he roamed or lose his tower
there was nothing to be done about it
and ganking a midlane yorick happened to be surprisingly difficult to pull off i mean yea i see you jungler im walling of that poor TF and throwing a handful of ghouls your way have fun being slowed and minionblocked
so he kinda gave up after 3 tries
TBH i lost that game if i remember correctly but it was fun and i did really well, the TF was pretty tilted tho and the enemy was arguing if my team had done better this wouldve been won from the tilt alone ^^
So yes sometimes doing troll stuff can really throw people off.
Though from experience i can say that this works best if you pick a champion with clear contributions to your team whether that is by tanking or providing utility or being exceptional at things like taking objectives and splitpushing
Then you can go for those things and your team wont have to adapt much if at all which works best
Doing trolly stuff which relies on your team to work best can work against you.