With bitlicense in New York and similar things in a few other states yeah, there are more and more that want ID for KYC, but in many areas like Las Vegas no id is needed below a certain amount. Usually around $2k.
Is that a daily/weekly/monthly or final limit? $2000 before needing ID is a pretty large sum of money, especially when you can work around that limit by using different ATM's of the same issuer.
Perhaps that the ATM issuer isn't playing by the rules, which is great for those using those ATM's, but might turn out to be a legal nightmare for the issuer. Violating money trasmitter laws isn't something you wan't to be accused of.
I know of a few local ATM's myself, and they aren't that generous unfortunately. The last time I checked you could only purchase 100 worth of Bitcoin without ID, and that's it. You can work around it by using different phone numbers, but the fees just kill this low value 'abuse'.