I don't think so, it's not because you buy cryptocurrency on an anonymous way that your money is laundered. It stays black money until you can prove how you legitimately earned it. (Or at least let it seem like you legitimately earned it.) Because when you get investigated by a tax authority they want to know the origin of your money, or in this case your bitcoins. When you can't prove how you earned/got them you will be in trouble.
Money laundering is usually done with businesses by making more profit on paper than they do in reality. Only then it becomes legit money where they paid taxes on.
It was Al Capone that gave us the term money laundering because they used laundromat businesses to "launder" their money. Because these where businesses that you paid cash to it was very hard to investigate how much customers they had in reality. These businesses made money from real customers and Al Capone also laundered some profits from his illegal liquor business by making it look like it was income from paying customers.
In the case of these bitcoin atm's. The customers probably do it to buy bitcoin anonymously with cash. Everything on the bitcoin blockchain is traceable but when you don't give your user information nobody knows who you are. It seems like a more convenient way buying bitcoin with cash than meeting with someone on local bitcoins. Unless you want to make very big transactions which the atm's probably can't handle.
