Strava deserves all the blames it get, but don't you need some serious skills to find out who are the agents guarding Biden/Harris/Trump? I mean, if you can literally track down the names of Secret Service agents guarding VIPs, then you can probably easily track them with other means (phone for example) no?

Speaking out of most likely ignorance of Secret Service, I was in the US Marines. I dealt with marine snipers a few times during training exercises, we were mainly serve as security protections. I've seen them train, shoot and handle combat scenarios. If any of those marine snipers want to take shot at a VIP, I can't imagine Secret Service will be able to do anything to stop it. Some of the snipers are putting rounds into a postal stamp at 1,000 yard / 900 meters.