The active denial system was sold as a better water cannon to disperse protests, since it burns the skin over T-Shirts.
If Russia had just wanted to play with their new toy while victimizing people with no local sympathy, they could have hit e.g. guest workers in Dubai and Western expats in Thailand. Actually they have lots of isolated communities in Siberia they could have observed more easily while staying out of the news completely.
Even if the "what", "where", and "when" ends up conforming to current "journalistic" speculation in these cases, the "how", "why", and "who" will probably never be really known. It's fine to be suspicious when Russian media are blaming USA, because they are "rivals". In the reversed case, why wouldn't one retain that suspicion?
https://spectrum.ieee.org/semiconductors/devices/finally-a-l...