Why League is more fun for a "troll"
Now obviously I don't mean "trolling" in the sense of trying to make your own team lose just to torture them.
However, it seems that the longer this game continues, the more "troll" it is to deviate from the norm. A typical league game with no "trolls" is adc and supp bot (the supp MUST not take any cs, gold, or refuse to die for their carry and can be the only one with wards) an ap mid (who always loses the game for us by LETTING kat roam) a jungler (whose job is to single handedly secure dragon, even if bot doesnt ward it, and is a glorified supp for every lane, but he also must not take the cs) and a top (who can be bruiser ad or ap, Diversity! He must take tele or he is a troll and a noob). All builds are the same for the champ in that role every single game, no matter what. Split pushing is a tactic only for one member of your team is trolling and wont group, otherwise, you just sit mid and push 5v5 until one of you loses. If anyone deviates from that plan, they are a "troll"
However, for the "troll" the game is so much more than that, and is so much more fun. In this sense, i troll every game. Adc talon bot lane? Yessir. Taking j4 mid and jungling heim? i sure will. Ap varus (maybe even botlane) ohhhhhhh yeah. Solo darius botlane for the pull into tower and dunk them? i loves it. Builds now can change to meet your enemies weakness, or just to surprise them (nobody can resist trying to kill the tank shaco), tactics open up in infinite proportions when you "troll" your team by not just grouping mid at 20 min to push for the win or loss.
I would rather be accused of "trolling" every game than play the same boring meta game after game with no deviation.
tl;dr - The game is better for the troll, we should all be a little more troll.
on the enemy team and you are not prepared for her roam (by warding or managing the minion wave), its not at all the mid laners fault.
Mid can not and should not always follow Kat when she roams.
Its up to you - not to mid - to keep your lane safe.
If you know that Kat will roam and you play prepared you will win the game. every time she roams without getting a kill makes her lose CS and EXP.
You need to use her roam to your advantage.
I do a crap ton of damage with my auto's and all I need to do is snowball them and W my ADC, adc kills one guy, i smite and focus the tank doing true dmg cus of skirms passive aswell as magic dmg and sunifre dmg and regular physical dmg