He's old what instantly makes all of this super endearing and cute, so stop with all the hate.
Lots of older people play this game, this guy isn't an anomaly because of his age. In fact, a lot of the more hardcore players I know of are middle-aged and older.
You know who else tends to have makeshift boards stacked with phones for raids, or who has six accounts filling all the local gyms? Older people. At best, it's people using them for raids to get more spins on the slot machine of Pokemon Go; it's annoying having to deal with them sometimes because it turns out getting multiple accounts in a raid can be troublesome, and they'll ask you to back out because oh their fifth account didn't make it into the raid, but the most damage they're doing is to the trading economy, which isn't that big of a deal.
At worst, they're stacking gyms with their own accounts, which directly affects everybody else and makes it so the only real solution is for everyone else to start having multiple phones and accounts as well if they want coins. That's straight-up cheating and I don't give a shit how old you are, that's not cool.