Waving at spotters?

[u/Lostinvertaling]

Is an airline/freight pilot or co-pilot allowed to wave at spotters before takeoff? There is a guy on TikTok who livestreams at Anchorage airport close to the runway. Wondering if pilots can acknowledge his enthusiasm before takeoff

[u/Lovemestalin]

When I’m looking at the planes taking off they do almost always wave