Haven't had to deal with a vlogger on a flight but I'd have no problems asking them to knock it off if they get too annoying (i.e the bright light example above) and get a FA involved if needed. I've used a suction mount a couple times with my GoPro to get video out the window of a take off and landing and I can tell you that the actual GoPro branded suction mount when used properly will not turn into a cabin missile in anything short of a crash and if that happens all bets are off anyways.

FWIW there's a reason I've referred to selfie sticks the "staff of narcissus" for many years now. The only good use for one is to smack the idiots that are waving them around. Thankfully the novelty seems to have worn off quite a bit. That being said I wish I did have the extendable mini-tripod for my GoPro on a previous trip so I could see over the heads of people in a couple places I visited.