When Alister and Lynn entered the arcade, no one stopped them but only attracted the gazes from the people in the arcade before those gazes were retracted and those people returned to what they were doing.
After all, this was an arcade, not an adult club. So no one was nosy enough to shoo away a bunch of kids from entering the establishment.
When Alister went to the token booth with Lynn, he started using his mind control to let the cashier in the booth hand him out free tokens. And when someone managed to see what Alister was doing, Alister also used his mind control to remove the memories of those who witnessed him committing a crime.
In half a minute, Alister's pockets were filled with tokens and he also handed out a pouch filled with tokens to Lynn.
"See this Lynn? If I had wanted to, I can also rob a bank and even let the guards and staff in the bank pack up the money for me."