Ukraine is not a NATO ally. Article 5 of the Treaty of Washington is the "attack on one is an attack on all" (which is why the French fought in Afghanistan but not Iraq.)
The Alliance can still decide to do something (as they did in the Former Yugoslavian republics in the 90s) but frankly "going toe to toe with the Rooskies" is a lot less appetizing than beating up Serbia.
This finally explains the difference between one grandmother's cooking (Depression-era home cooking from scratch) and my other (younger) grandmother's cooking (Post-WW2 TV dinners and frozen vegetables.)
Same goes for business owners too. We had a 20Mbit fiber from our cable company where the multi year contract was expiring. We contacted a bandwidth broker to find us a better deal. He came back with a much better deal on fiber from the local telco. We submitted the telco contract to the cable company and they price matched us. We went from 20Mbit to 50Mbit and dropped the price by half. The broker cost somewhere around $300, and was the best money we ever spent.
Facebook also has a "no unusual name" policy, but it's very randomly enforced.
My friend's first name is "Spider." It is not her birth name, but she's used it professionally and personally her entire adult life.
When she signed up for Facebook they told her she couldn't be "Spider" because somebody (Sony probably) decided that wasn't a "real" name (Spider Robinson and Spider Sabich notwithstanding.) If she wanted to use "Spider" Facebook needed a legal ID with that name on it (which she does not have.)
So she registered under "Spidie" instead with no further problems.